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Appendix C: Missile Systems

APPENDIX C: MISSILE SYSTEMS WORK BREAKDOWN STRUCTURE AND DEFINITIONS C.1 SCOPE This appendix provides the Work Breakdown Structure and Definitions for missile systems. Definitions for WBS elements common to the missile system and all other defense materiel items are given in Appendix L: Common Elements, Work Breakdown Structure and Definitions.

C.2 APPLICABLE DOCUMENTS

C.2.1 Non-Government publications. The following documents form a part of this document to the extent specified herein.

AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)

ANSI/IEEE STD 610.12-1990 (R2002), Standard Glossary of Software Engineering Terminology

ANSI Standards can be found online at:

http://webstore.ansi.org

ANSI Customer Service 25 W 43rd Street, 4th Floor New York, NY, 10036

The Institute of Electrical and Electronics Engineers, Inc. (IEEE) Operations Center 445 Hoes Lane Piscataway, NJ 08854-4141 www.ieee.org

American Society for Testing and Materials (ASTM)

ASTM F2541-06 Guide for Unmanned Underwater Vehicle (UUV) Autonomy and Control

ASTM Standards can be found online at:

ht tp : // www. a s t m.o r g

100 Barr Harbor Drive West Conshohocken, Pennsylvania, USA Phone: (610) 832-9500 Fax: (610) 832-9555

C.3 WORK BREAKDOWN STRUCTURE LEVELS

1.0Missile System
- 1.1Air Vehicle
  - 1.1.1Airframe
    - 1.1.1.1Airframe Integration, Assembly, Test and Checkout
    - 1.1.1.2Primary Structure
    - 1.1.1.3Secondary Structure
    - 1.1.1.4Aero-Structures
    - 1.1.1.5Other Airframe Components 1…n (Specify)
  - 1.1.2Propulsion Subsystem (1…n) Specify
    - 1.1.2.1Propulsion Integration, Assembly, Test and Checkout
    - 1.1.2.2Motor/Engine (Specify)
    - 1.1.2.3Thrust Vector Actuation
    - 1.1.2.4Attitude Control System
    - 1.1.2.5Fuel/Oxidizer Liquid Management
    - 1.1.2.6Arm/Fire Device
    - 1.1.2.7Flight Termination/Mission Termination
    - 1.1.2.8Propulsion Software Release 1…n
    - 1.1.2.9Other Propulsion Subsystems 1…n (Specify)
  - 1.1.3Power and Distribution
    - 1.1.3.1Power and Distribution Integration, Assembly, Test and Checkout
    - 1.1.3.2Primary Power
    - 1.1.3.3Power Conditioning Electronics
    - 1.1.3.4Distribution Harness
    - 1.1.3.5Power and Distribution Software Release 1…n
    - 1.1.3.6Other Power and Distribution Subsystems 1…n (Specify)
  - 1.1.4Guidance
    - 1.1.4.1Guidance Integration, Assembly, Test and Checkout
    - 1.1.4.2Dome Assembly
    - 1.1.4.3Seeker Assemblies
    - 1.1.4.4Guidance Software Release 1…n
    - 1.1.4.5Other Guidance Subsystems 1…n (Specify)
  - 1.1.5Navigation
    - 1.1.5.1Navigation Integration, Assembly, Test and Checkout
    - 1.1.5.2Sensor Assemblies
    - 1.1.5.3Navigation Software Release 1…n (Specify)
    - 1.1.5.4Other Navigation Subsystems 1…n (Specify)
  - 1.1.6Controls
    - 1.1.6.1Controls Integration, Assembly, Test and Checkout
    - 1.1.6.2Primary Structure
    - 1.1.6.3Fin/Canard Deployment System
    - 1.1.6.4Actuators
    - 1.1.6.5Control Power
    - 1.1.6.6Controls Software Release 1…n
    - 1.1.6.7Other Control Subsystems 1…n (Specify)
  - 1.1.7Communications
    - 1.1.7.1Communications Integration, Assembly, Test and Checkout
    - 1.1.7.2Antenna Assembly
    - 1.1.7.3Communications Software Release 1…n
    - 1.1.7.4Other Communications Subsystems 1…n (Specify)
  - 1.1.8Payload
    - 1.1.8.1Payload Integration, Assembly, Test and Checkout
    - 1.1.8.2Target Detection Mechanism
    - 1.1.8.3Target Detection Device
    - 1.1.8.4Fuze
    - 1.1.8.5Payload Software Release 1…n
    - 1.1.8.6Other Payload Subsystems 1…n (Specify)
  - 1.1.9Reentry System
  - 1.1.10Post Boost System
  - 1.1.11Ordnance Initiation Set
  - 1.1.12On Board Test Equipment
  - 1.1.13On Board Training Equipment
  - 1.1.14Auxiliary Equipment
  - 1.1.15Air Vehicle Software Release 1…n
  - 1.1.16Air Vehicle Integration, Assembly, Test and Checkout
- 1.2Encasement Device
  - 1.2.1Encasement Device Integration, Assembly, Test and Checkout
  - 1.2.2Encasement Device Structure
  - 1.2.3Encasement Device Software Release 1…n
  - 1.2.4Other Encasement Device Subsystems 1…n (Specify)
- 1.3Command and Launch
  - 1.3.1Command and Launch Integration, Assembly, Test and Checkout
  - 1.3.2Surveillance, Identification and Tracking Sensors
  - 1.3.3Launch and Guidance Control
  - 1.3.4Communications
  - 1.3.5Launcher Equipment
  - 1.3.6Auxiliary Equipment
  - 1.3.7Booster Adapter
  - 1.3.8Command and Launch Software Release 1…n
  - 1.3.9Other Command and Launch 1…n (Specify)
- 1.4Missile System Software Release 1…n
- 1.5Missile System Integration, Assembly, Test and Checkout
- 1.6System Engineering
- 1.7Program Management
- 1.8System Test and Evaluation
  - 1.8.1Development Test and Evaluation
  - 1.8.2Operational Test and Evaluation
  - 1.8.3Mock-ups / System Integration Labs (SILs)
  - 1.8.4Test and Evaluation Support
  - 1.8.5Test Facilities
- 1.9Training
  - 1.9.1Equipment
  - 1.9.2Services
  - 1.9.3Facilities
- 1.10Data
  - 1.10.1Technical Publications
  - 1.10.2Engineering Data
  - 1.10.3Management Data
  - 1.10.4Support Data
  - 1.10.5Data Depository
- 1.11Peculiar Support Equipment
  - 1.11.1Test and Measurement Equipment
  - 1.11.2Support and Handling Equipment
- 1.12Common Support Equipment
  - 1.12.1Test and Measurement Equipment
  - 1.12.2Support and Handling Equipment
- 1.13Operational/Site Activation
  - 1.13.1System Assembly, Installation and Checkout on Site
  - 1.13.2Contractor Technical Support
  - 1.13.3Site Construction
  - 1.13.4Site/Ship/Vehicle Conversion
  - 1.13.5Sustainment/Interim Contractor Support
- 1.14Industrial Facilities
  - 1.14.1Construction/Conversion/Expansion
  - 1.14.2Equipment Acquisition or Modernization
  - 1.14.3Maintenance (Industrial Facilities)
- 1.15Initial Spares and Repair Parts

C.3.1 Application of Common WBS Elements (Appendix L). WBS elements that are common (i.e., Integration, Assembly, Test and Checkout; Systems Engineering; Program Management; System Test and Evaluation; Training; and Data) should be applied to the appropriate levels within the WBS for which they support. For example, if Systems Engineering is required to support a Level 3 WBS element, the Systems Engineering WBS element would appear at Level 4 of the WBS under the Level 3 element it supports.

C.3.2 Key Principles in Constructing a WBS. In the appendices of MIL-STD-881C, the WBS is defined to Level 3 of that structure and in some cases Level 4 or 5. In order to ensure consistency across all systems and developers, WBS elements in the appendices are extended to levels 4 and 5.

1) The reporting level of the WBS is typically at Level 3 except for those items considered high cost, high risk, or high technical interest. For those elements, extension of the WBS to lower levels is necessary to get needed visibility, but only for those elements. Not all WBS elements should be extended to the lowest level. In addition, for each system being defined only those WBS elements that define the system shall be used. The purpose of going below level 3 within the appendix is to ensure that the higher level elements include the proper lower level elements and when required to report at a lower level, those elements at level 4 or 5 are consistent across all systems and developers.

2) In each of the appendices, an element entitled “Other” is available to provide flexibility within the WBS for new or additional WBS elements that are not identified or defined in the Standard. These “other” elements would be used if, for example, a new subsystem or modified subsystem is defined and it does not currently appear in the appendices of MIL-STD-881C.

3) A key to WBS development is the principle that if you can associate the WBS element with the element it supports, it should be included within that element. This is called the 100% rule, which states the next level of decomposition of a WBS element (child level) must represent 100% of the work applicable to the next higher level (parent level). For example, the parent level WBS (radar system) has three child elements – transmitter, antenna, and receiver. If the program manager decides he/she wants more visibility into the transmitter subsystem and pulls it out of the radar system and makes it a level equal to the radar, it distorts the effort and resources that are required to complete that radar system because it assumes the transmitter is not included (i.e., a child element to the radar is now missing within the WBS structure).

4) In some cases, items cannot be specifically associated with the element they support. For example, software is a critical element of that transmitter subsystem. Under normal circumstances, software would be the child level to the parent level transmitter. However, depending on how software is developed, the software may include more functionality than just for the transmitter subsystem. It may include functionality for the receiver as well. In this case the software cannot be associated with the specific elements they support, due to an inability to determine the effort for each functionality developed. Therefore, it is appropriate to associate that software to the next highest level (radar system) of the WBS. It is still included as a part of the radar system at the child level, but we are not trying to allocate effort across multiple WBS elements where we are unable to determine what level of support each gets.

5) Intelligence (Intel) efforts (security, threat, mission data) are often considered late in the acquisition cycle, even after contract award. Identifying where Intel is needed reduces risk and affords a much better opportunity to manage cost, schedule, and performance. The WBS Standard portrays systems in a product-oriented WBS, identifying and considering potential intelligence information and costs using the existing Component cost estimating processes.

C.3.3 Numbering of the WBS. In each appendix, the work breakdown structure for that commodity has been numbered for reporting purposes only. The purpose for the numbering is to provide a consistent approach to identifying and managing the WBS across like systems regardless of vendor or service. The numbering system is numeric; however, several unique issues arise across appendices which require the numbering system to be modified to accommodate the anomalies.

C.3.3.1. “Other” WBS Elements. All appendices contain a WBS element titled as “Other” at the subsystem, element (product) levels that are restricted for products that have not been envisioned or predicted within the defined WBS elements in the Appendix. If it is determined that the “other” WBS is not needed, this element and assigned WBS number should be deleted and not used in the WBS. If it is determined that the “other” element is needed, then each element must be defined and the word “other” replaced by the newly defined WBS element using the assigned WBS number from the appropriate appendix. The newly defined element must be approved by the Government Program Manager and the representative contracting officer.

C.3.3.2 (1…n) WBS Element Definitions. Several appendices identify WBS elements with (1…n) or similar to denote that one or more of that type of item may be used. Where this structure occurs, the parent WBS (e.g., 1…n) shall be decomposed to the next level and then each child WBS use the appropriate WBS title for each element as well as the WBS numbering identification. For example, if a missile system has multiple propulsion subsystems, each Propulsion Subsystem (1…n) shall have a WBS name designation (for example, “Solid Rocket Motor”), and the element Propulsion Subsystem 1 would be at the child level of the parent WBS element (Propulsion Subsystem 1…n) as would Propulsion Subsystem 2 (for example, “Liquid Rocket Engine”), and so forth. Each WBS should be detailed down to the element’s lower level (as defined in the appendices) whenever possible, and assigned the next available WBS number in sequence according to the parent child relationship as shown below.

1.1.2. Propulsion Subsystem (1…n)
1.1.2.1. Solid Rocket Motor
1.1.2.2. Liquid Rocket Engine
1.1.2.3. Backup Rocket Motor

C.4 DEFINITIONS

C.4.1 Missile System. The complex of hardware, software, data, services, and facilities required to develop and produce the capability of employing a missile weapon in an operational environment to detect and defeat selected targets. Specific examples include, but are not limited to: AIM-9X, AMRAAM, ESSM, HARM, Javelin, TOW, RAM, Stinger, Standard Missile, Tomahawk, JASSM, Minuteman, GMLRS, JAGM, Patriot, AARGM, and Trident.

C.4.2 Air Vehicle. An Air vehicle is a guided weapon self-propelled after leaving its launching device that has as its purpose the delivery of a payload for destruction (or defeat) of some object or target. Missiles may be classified as tactical or strategic (such as ballistic missiles). It also includes the design, development, and production of complete units (i.e., the prototype or operationally configured units, which satisfy the requirements of their applicable specification(s), regardless of end use).

C.4.2.1 Airframe. This element comprises the structural framework that provides the aerodynamic shape, mounting surfaces and environmental protection for the air vehicle components, which are not directly applicable to other specific Level 3 air vehicle subsystems.

Includes, for example:
a. Wings and fins that provide aerodynamic flight control in response to electro-mechanical signals and are attached to the air vehicle body
b. Structural body assemblies including the structure, fuel tanks that integral with the structure, covers, skins, adhesives, and fairings not directly applicable to any other Level 3 air vehicle subsystem
c. Protection devices for stressing environmental conditions such as thermal protection system or rain erosion that are not directly applicable to other Level 3 air vehicle subsystems

C.4.2.1.1 Airframe Integration, Assembly, Test, and Checkout. This element includes all effort of technical and functional activities associated with the design, development, and production of mating surfaces, structures, equipment, parts, materials, interconnect harnessing and software required for the integration, assembly and checkout of the Level 4 elements below into their Level 3 element, Airframe.

C.4.2.1.2 Primary Structure. This element comprises the structural framework that provides for load carry hardware such as the air carry system, interfaces to loading and launching devices, and other hard points needed to protect the air vehicle from environmental induced loads.

C.4.2.1.3 Secondary Structure. This element comprises the secondary hardware needed to maintain aerodynamic shapes, interfaces between other subsystems, fuel tanks, protection subsystems such as a Thermal Protection System (TPS), and other structure not directly associated with the primary structure or other Level 3 subsystems.

C.4.2.1.4 Aero – Structures. This element comprises the hardware needed for aerodynamic flight effects. It includes, for example, the wings, fins, canards, stability systems, and inlets for air breathing propulsion.

C.4.2.1.5 Other Airframe Components 1…n (Specify). This element comprises the complex of equipment, not included in the above Level 4 elements, that is unanticipated at the time of issuance of this appendix due to the evolution of technology but necessary to complete this Level 3 element.

C.4.2.2 Propulsion Subsystem 1…n (Specify). The equipment to provide thrust to propel the air vehicle on its intended flight. The total propulsion system may be composed of one or more subsystems that ignite, burn, and may be jettisoned sequentially over the course of flight. Individual subsystems may employ solid, liquid, or air- breathing technologies. This element and the Level 4 elements below comprise the equipment to make up a single propulsion system.

C.4.2.2.1 Propulsion System Integration, Assembly, Test, and Checkout. This element includes all effort of technical and functional activities associated with the design, development, and production of mating surfaces, structures, equipment, parts, materials, interconnect harnessing and software required for the integration, assembly and checkout of the Level 4 elements below into their Level 3 element, Propulsion System. For example, this element includes those structural elements that transfer the thrust loads or provide the primary path for vehicle loads through the propulsion system such as forward and aft skirts and/or interstages or other components through which the propulsion system is attached to the missile air vehicle and transfers primary loads. In addition it includes the hardware and secondary structure to provide interfaces to other elements such as raceways, connectors, cutouts, access doors, etc. or any other hardware that interfaces with other elements of the air vehicle except for primary structural elements.

C.4.2.2.2 Motor/Engine (Specify). The structure (integral to the propulsion system), propellant, controls, instrumentation, and all other installed subsystem equipment integral to the rocket motor or engine as an entity within itself.

Includes, for example:
a. Solid Rocket Motor. This element is applicable to a solid propulsion system and consists of the thrust producing component in which solid propellant, made up of fuel and oxidizer, is combusted and expelled through a nozzle. It includes the pressure vessel, an igniter, internal insulation, solid propellant and a nozzle. If applicable it includes the functionality to move the nozzle or a portion of the nozzle but not the actuation subsystem to cause that movement. Where applicable, may include Booster Adapter.
b. Liquid Rocket Engine. This element is applicable to a liquid propulsion system and is a thrust producing device in which liquid fuel and oxidizer are delivered to the engine. Within the engine the fuel and oxidizer are combusted and expelled through a nozzle to produce thrust. It includes any turbines, pumps, valves, etc. to deliver the fuel and oxidizer to the combustion chamber. It may include valves or other control components to throttle the thrust level during operation as well as additional
thrusters for vehicle control. If applicable, it includes the functionality to move the engine or a portion of the engine for thrust vector control but not the actuation subsystem to cause that movement.
c. Air Breathing Engine. This element is applicable to an air breathing propulsion system in which a stream of air is supplied to the engine along with a liquid fuel. The engine operates to mix and combust the air and fuel and to expel the products through a nozzle to produce thrust. It includes all the turbines, compressors, injectors, etc. to act on the air and fuel from the inlet to the engine through the exhaust from the engine. It does not include aerodynamic inlets on the air vehicle to deliver air to the engine.

NOTE 1: If lower level information can be collected, use the structure and definitions in Appendix B, Electronic Systems. NOTE 2: All effort directly associated with the remaining Level 4 WBS elements and the integration, assembly, test, and checkout of these elements into the air vehicle is excluded.

C.4.2.2.3 Thrust Vector Actuation. Those items integral to the propulsion system to move the nozzle, engine or a portion of the nozzle or engine.

Includes, for example:
a. Actuator and all of the components needed to move the actuator

Excludes, for example:
a. Vanes or other similar items mounted external to the propulsion system that may act on the exhaust from the propulsion system unless they are part of a item integral to the propulsion system
b. Any other part of the control system for the air vehicle

C.4.2.2.4 Attitude Control System. The Attitude Control System (ACS) or Divert/Attitude Control Systems (DACS) that are separate from the propulsion rocket motor or engine. These systems can be of any type: cold gas, warm gas, liquid propellant, solid propellant, etc.

Includes, for example:
a. All of the thrusters, lines, valves, propellant tanks, gas tanks, manifolds
b. Control system for the ACS/DACS to the extent that the control system is integral to the propulsion system

Excludes, for example:
a. The control system or elements of the control system if these are separate from the ACS/DACS with the only interface being a signal to a valve or distributor on the ACS/DACS

C.4.2.2.5 Fuel/Oxidizer Liquid Management. All of the tanks, lines, pressurization system and/or pressure control, pumps, valves, etc. to deliver the fuel and oxidizer to the engine at the required conditions.

C.4.2.2.6 Arm/Fire Devices. Hardware to arm, disarm and initiate operation of the propulsion system.

C.4.2.2.7 Flight Termination/Mission Termination. Hardware and ordnance to cause the propulsion system to cease operation and, if applicable, cause the propulsion system to break up. It may include the ability to arm and disarm.

C.4.2.2.8 Propulsion Software Release 1…n. All propulsion subsystem software not associated with a specific Level 4 element above.

NOTE: Refer to Appendix B, Electronic Systems for further breakout and definitions for Software.

C.4.2.2.9 Other Propulsion Subsystems 1…n (Specify). This element comprises the complex of equipment, not included in the above Level 4 elements, that is unanticipated at the time of issuance of this appendix due to the evolution of technology but necessary to complete this Level 3 element.

C.4.2.3 Power and Distribution. This element comprises prime power and distribution for the air vehicle.

C.4.2.3.1 Power and Distribution Integration, Assembly, Test, and Checkout. This element includes all effort of technical and functional activities associated with the design, development, and production of mating surfaces, structures, equipment, parts, materials, interconnect harnessing and software required for the integration, assembly and checkout of the Level 4 elements below into their Level 3 element, Power and Distribution.

C.4.2.3.2 Primary Power. This element comprises primary power for the air vehicle.

Excludes, for example:
a. Batteries, which may be integral to other Level 3 elements

C.4.2.3.3 Power Conditioning Electronics. This element comprises prime power conditioning electronics. It excludes power conditioning integral to other Level 3 elements.

NOTE 1: If lower level information can be collected, use the structure and definitions in Appendix B, Electronic Systems.

NOTE 2: All effort directly associated with the remaining Level 4 WBS elements and the integration, assembly, test, and checkout of these elements into the air vehicle is excluded.

C.4.2.3.4 Distribution Harness. This element comprises prime power distribution harnesses.

Excludes, for example:
a. Harnessing integral to other Level 3 elements

C.4.2.3.5 Power and Distribution Software Release 1…n. All power and distribution subsystem software not associated with a specific Level 4 element above.

NOTE: Refer to Appendix B, Electronic Systems for further breakout and definitions for Software.

C.4.2.3.6 Other Power and Distribution Subsystems 1…n (Specify). This element comprises the complex of equipment, not included in the above Level 4 elements, that is unanticipated at the time of issuance of this appendix due to the evolution of technology but necessary to complete this Level 3 element.

C.4.2.4 Guidance. Guidance is the process of maneuvering the air vehicle to engage the intended target. This WBS element is the compliment of hardware, software and equipment for target detection, signal processing, implementation of guidance laws and generation of guidance commands.

Excludes, for example:
a. Navigation
b. Control

C.4.2.4.1 Guidance Integration, Assembly, Test, and Checkout. This element includes all effort of technical and functional activities associated with the design, development, and production of mating surfaces, structures, equipment, parts, materials, interconnect harnessing and software required for the integration, assembly and checkout of the Level 4 elements below into their Level 3 element, Guidance.

C.4.2.4.2 Dome Assembly. Windows, domes or radomes, and associated retention mechanisms, to cover the seeker(s) apertures used for target detection and are suitable to support seeker functionality. Contingent upon the design, this may be included within the Seeker Assemblies WBS element.

C.4.2.4.3 Seeker Assemblies. This element comprises the sensors (RF, EO, SAL, etc., as applicable), sensor electronics, gimbal assembly, on-gimbal electronics and integral structure(s), which constitutes the seeker assembly.

Includes, for example:
a. Radio frequency (RF), electro optical (EO), and semi-active laser (SAL) sensors

C.4.2.4.4 Guidance Software Release 1…n. All guidance subsystem software not associated with a specific Level 4 element above.

NOTE: Refer to Appendix B, Electronic Systems for further breakout and definitions for Software.

C.4.2.4.5 Other Guidance Subsystems 1…n (Specify). This element should be replaced with other product- oriented guidance subsystems that are either not listed above or that cannot be categorized into one of the above elements. Each additional element is to be clearly identified and defined.

C.4.2.5 Navigation. The compliment of hardware, software and equipment to measure or determine body angles and /or body linear motion and generation of navigation commands.

Excludes, for example:
a. Guidance
b. Control

C.4.2.5.1 Navigation Integration, Assembly, Test, and Checkout. This element includes all effort of technical and functional activities associated with the design, development, and production of mating surfaces, structures, equipment, parts, materials, interconnect harnessing and software required for the integration, assembly and checkout of the Level 4 elements below into their Level 3 element, Navigation.

C.4.2.5.2 Sensor Assemblies. Hardware that provides data for determination of air vehicle location and orientation.

Includes, for example:
a. Global Positioning System (GPS) receiver and antenna
b. Inertial sensors
c. Altimeter

C.4.2.5.3 Navigation Software Release 1…n. All navigation subsystem software not associated with a specific Level 4 element above.

NOTE: Refer to Appendix B, Electronic Systems for further breakout and definitions for Software.

C.4.2.5.4 Other Navigation Subsystems 1…n (Specify). This element comprises the complex of equipment, not included in the above Level 4 elements, that is unanticipated at the time of issuance of this appendix due to the evolution of technology but necessary to complete this Level 3 element.

C.4.2.6 Controls. The hardware, software and equipment for controlling the motion of the air vehicle from launch to intercept.

Includes, for example:
a. Control devices for canard, wing, tail, etc.
b. Thrust vector / jet van
c. Explosive charge / lateral thrusters

Excludes, for example:
a. Control surfaces themselves (such as canards, wings, tails, etc.) included in the Airframe element

C.4.2.6.1 Controls Integration, Assembly, Test, and Checkout. This element includes all effort of technical and functional activities associated with the design, development, and production of mating surfaces, structures, equipment, parts, materials, interconnect harnessing and software required for the integration, assembly and checkout of the Level 4 elements below into their Level 3 element, Controls.

C.4.2.6.2 Primary Structure. The structural framework not part of the Airframe element.

C.4.2.6.3 Fin/Canard Deployment System. The hardware for fin/canard deployment.

C.4.2.6.4 Actuators. The hardware for actuation to include motors and servos.

C.4.2.6.5 Control Power. This element comprises power for the control element.

Excludes, for example:
a. Central power sources included in the Power and Distribution WBS element

C.4.2.6.6 Controls Software Release 1…n. All controls subsystem software not associated with a specific Level 4 element above.

NOTE: Refer to Appendix B, Electronic Systems for further breakout and definitions for Software.

C.4.2.6.7 Other Control Subsystems 1…n (Specify). This element comprises the complex of equipment, not included in the above Level 4 elements, that is unanticipated at the time of issuance of this appendix due to the evolution of technology but necessary to complete this Level 3 element.

C.4.2.7 Communications. The data link equipment to enable communications between the air vehicle and an external entity (or entities). Data links can be either receive only or send only (one-way) or bidirectional (two way).

Includes, for example:
a. Data transmission and reception for networking, command and control, battle space awareness, and air traffic management enabling the air vehicle to be a node in the net

C.4.2.7.1 Communications Integration, Assembly, Test, and Checkout. This element includes all effort of technical and functional activities associated with the design, development, and production of mating surfaces, structures, equipment, parts, materials, interconnect harnessing and software required for the integration, assembly and checkout the Level 4 elements below into their Level 3 element, Communication.

C.4.2.7.2 Antenna Assembly. The hardware comprising the Antenna Assembly or Assemblies.

C.4.2.7.3 Communication Software Release 1…n. All communication subsystem software not associated with a specific Level 4 element above.

NOTE: Refer to Appendix B, Electronic Systems for further breakout and definitions for Software.

C.4.2.7.4 Other Communications Subsystems 1…n (Specify). This element comprises the complex of equipment, not included in the above Level 4 elements, that is unanticipated at the time of issuance of this appendix due to the evolution of technology but necessary to complete this Level 3 element.

C.4.2.8 Payload. The Target Defeat Mechanism (TDM) and its support assemblies. Normally, payload consists only of the TDM and its associated target detection, arming and fuzing equipment. However, with complex air vehicles containing subair vehicles (submunitions), the payload subsystem may mimic the larger system by having its own guidance and control, fuze, safe-arm, and propulsion. In multi-mission or adaptable payloads there may be a communication device that provides data to payload for output yield, real-time directions for aimable capabilities or layer-counting type applications.

C.4.2.8.1 Payload Integration, Assembly, Test, and Checkout. This element includes all effort of technical and functional activities associated with the design, development, and production of mating surfaces, structures, equipment, parts, materials, interconnect harnessing and software required for the integration, assembly and checkout of the =Level 4 elements below into their Level 3 element, Payload.

C.4.2.8.2 Target Defeat Mechanism. The hardware and software that produce(s) the desired effect on the target. TDMs include, but are not limited to, conventional high explosives (explosive outputs of blast, fragmentation, and penetrator-forming), directed energy devices, kinetic energy devices, dispensed submunitions or others.

C.4.2.8.3 Target Detection Device (TDD). The hardware and software that detects and signals the presence of a target. TDDs include, but are not limited to, contact sensors (make or break electronics), EO or RF based proximity sensors and necessary hardware and software for signal processing.

C.4.2.8.4 Fuze. The equipment in the air vehicle that controls the capability of initiating the TDM (e.g., mechanical, hydrostatic, inertial, counters, and timers). It includes the hardware and software for the Safe, Arm and Fire (SAF) function; sensors and algorithms, if applicable, to enable “smart fuzing”; and the hardware and software associated with the firing train.

C.4.2.8.5 Payload Software Release 1…n. All payload subsystem software not associated with a specific Level 4 element above.

NOTE: Refer to Appendix B, Electronic Systems for further breakout and definitions for Software.

C.4.2.8.6 Other Payload Subsystems 1…n (Specify). This element comprises the complex of equipment, not included in the above Level 4 elements, that is unanticipated at the time of issuance of this appendix due to the evolution of technology but necessary to complete this Level 3 element.

C.4.2.9 Re-entry System. For exo-atmospheric missiles, the reentry system is the aggregate of prime equipment items consisting of a deployment module, reentry vehicles, payload, penetration aids and ascent shroud, which provide structural support and environmental protection of nuclear payloads during the ground deployment and flight.

Includes, for example:
a. Reentry vehicle (aero-structure), which provides reentry protection for the internally carried warheads 1. For independent maneuvers, the reentry vehicle will contain navigation, guidance, control, sensors, and processing systems, which provide the reentry systems capability to acquire and track targets and execute the necessary flight path to the selected target
b. The arming and fuzing system, which provides the proper electrical signals to detonate the warhead

Excludes, for example:
a. All effort directly associated with the remaining Level 3 WBS elements and the integration, assembly, test, and checkout of these elements into the air vehicle

NOTE 1: If lower level information can be collected, use the structure and definitions in Appendix B, Electronic Systems.

NOTE 2: All effort directly associated with the remaining Level 3 WBS elements and the integration, assembly, test, and checkout of these elements into the air vehicle is excluded.

C.4.2.10 Post Boost System.

Includes, for example:
a. Exo-atmospheric missiles; provides the roll rate control and the final velocity to adjust and deploy the payload
b. Single warhead missile; structure, external protection material, velocity control system, and deployment group
c. Multiple warhead missile; structure, axial engines, attitude control equipment, propellant storage assembly, and pressurized system

NOTE 1: If lower level information can be collected, use the structure and definitions in Appendix B, Electronic Systems. NOTE 2: All effort directly associated with the remaining Level 3 WBS elements and the integration, assembly, test, and checkout of these elements into the air vehicle is excluded.

C.4.2.11 Ordnance Initiation Set. In exo-atmospheric missiles, the ordnance initiation set initiates all ordnance events throughout the missile and ground system (except reentry system components). Upon receipt of an electrical signal from the missile guidance and control system, the ordnance initiation set firing units convert the signal into ordnance outputs to the detonating cords. Among these ordnance events are stage separation, motor ignition, gas generator ignition, shroud separation, etc.

Includes, for example:
a. Through bulkhead initiators, ordnance test harnesses, and firing units/exploding bridgewires

NOTE 1: If lower level information can be collected, use the structure and definitions in Appendix B, Electronic Systems. NOTE 2: All effort directly associated with the remaining Level 3 WBS elements and the integration, assembly, test, and checkout of these elements into the air vehicle is excluded.

C.4.2.12 On Board Test Equipment. This element comprises the payload that is interchangeable with the live warhead and suitable for development or operational testing in a free flight (post launch) environment.

Includes, for example:
a. Recovery systems
b. Special instrumentation
c. Telemetry equipment,
d. Flight termination equipment, etc., suitable for a launch and free flight environment

NOTE 1: If lower level information can be collected, use the structure and definitions in Appendix B, Electronic Systems. NOTE 2: All effort directly associated with the remaining Level 3 WBS elements and the integration, assembly, test, and checkout of these elements into the air vehicle is excluded.

C.4.2.13 On Board Training Equipment. This element comprises the payload that is interchangeable with the live warhead and suitable for testing in a non-launch environment. Includes, for example, special instrumentation, telemetry equipment, etc., suitable for a non-launch environment.

NOTE 1: If lower level information can be collected, use the structure and definitions in Appendix B, Electronic Systems. NOTE 2: All effort directly associated with the remaining Level 3 WBS elements and the integration, assembly, test, and checkout of these elements into the air vehicle is excluded.

C.4.2.14 Auxiliary Equipment. This element comprises the complex of additional external equipment generally excluded from other specific Level 3 elements. Includes, for example, (a) Environmental control, safety and protective subsystems, destruct systems, etc., if these were not accounted for in other WBS elements, and (b) Equipment of a single purpose and function, which is necessary for accomplishing the assigned mission.

NOTE 1: If lower level information can be collected, use the structure and definitions in Appendix B, Electronic Systems. NOTE 2: All effort directly associated with the remaining Level 3 WBS elements and the integration, assembly, test, and checkout of these elements into the air vehicle is excluded.

C.4.2.15 Air Vehicle Software Release 1…n. All air vehicle software not associated with a specific Level 3 or Level 4 element.

NOTE: Refer to Appendix B, Electronic Systems for further breakout and definitions for Software.

C.4.2.16 Air Vehicle Integration, Assembly, Test, and Checkout. This element includes all effort of technical and functional activities associated with the design, development, and production of mating surfaces, structures, equipment, parts, materials, interconnect harnessing and software required for the integration, assembly and checkout of the above Level 3 elements into their Level 2 element, Air Vehicle.

C.4.3 Encasement Device. The hardware and software associated with the Air Vehicle Canister or Encasement device.

C.4.3.1 Encasement Device Integration, Assembly, Test, and Checkout. This element includes all effort of technical and functional activities associated with the design, development, and production of mating surfaces, structures, equipment, parts, materials, interconnect harnessing and software required for the integration, assembly and checkout of the Level 3 elements below into their Level 2 element, Encasement Device.

C.4.3.2 Encasement Device Structure. This element comprises the primary structure of the canister or encasement device.

C.4.3.3 Encasement Software Release 1…n. All Encasement software not associated with a specific Level 3 element above.

NOTE: Refer to Appendix B, Electronic Systems for further breakout and definitions for Software.

C.4.3.4 Other Encasement Device Subsystems 1…n (Specify). This element comprises the complex of equipment, not included in the above Level 3 elements, that is unanticipated at the time of issuance of this appendix due to the evolution of technology but necessary to complete this Level 2 element.

NOTE 1: If lower level information can be collected, use the structure and definitions in Appendix B, Electronic Systems. NOTE 2: All effort directly associated with the remaining Level 3 WBS elements and the integration, assembly, test, and checkout of these elements into the Encasement Device element is excluded.

C.4.4 Command and Launch. The subsystems installed at a launch site or aboard launch vehicles required to store, make ready, and launch the air vehicles of the missile system.

Includes, for example:
a. Those equipments required to acquire and condition the necessary intelligence of selected targets, reach launch decisions, command the launch, and provide guidance and control where such capability is not self contained aboard the air vehicle
b. Design, development and production of complete units (i.e., the prototype or operationally configured units, which satisfy the requirements of their applicable specification(s), regardless of end use)

C.4.4.1 Command and Launch Integration Assembly Test and Checkout. This element includes all effort of technical and functional activities associated with the design, development, and production of mating surfaces, structures, equipment, parts, materials, interconnect harnessing and software required for the integration, assembly and checkout of the Level 3 elements below into their Level 2 element, Command and Launch.

C.4.4.2 Surveillance, Identification, and Tracking Sensors. The sensors required to support missile systems by maintaining surveillance against incoming targets and providing the data required for targeting, launch, midcourse guidance, and homing where such capability is not self-contained aboard a missile system air vehicle. For all classes of missiles:

Includes, for example:
a. Tracking of the missile system air vehicles as required for guidance and control or range safety
b. Sensors of any spectrum (radar, optical, infrared, etc.), which are external to the air vehicle

Excludes, for example:
a. Subsystems used in safety, destruct, test, or training activities
b. Unless they are required operational items

NOTE 1: If lower level information can be collected, use the structure and definitions in Appendix B, Electronic Systems. NOTE 2: All effort directly associated with the remaining Level 3 WBS elements and the integration, assembly, test, and checkout of these elements into the Command and Launch element is excluded.

C.4.4.3 Launch and Guidance Control. The equipment to target air vehicles, make launch decisions, and command launch.

Includes, for example:
a. Control and checkout console, data displays, secure code device, programmer group, communication control console, command message processing group, and digital data group
b. Equipment at the launch facility/vehicle and/or the launch control center(s) (air, sea, or mobile)
c. Launch code processing system

NOTE 1: If lower level information can be collected, use the structure and definitions in Appendix B, Electronic Systems. NOTE 2: All effort directly associated with the remaining Level 3 WBS elements and the integration, assembly, test, and checkout of these elements into the Command and Launch element is excluded.

C.4.4.4 Communications. The equipment, not resident on the air vehicle, which distributes intelligence between the air vehicle and the command and launch equipment.

Includes, for example:
a. Inter-communication subsystems of launch sites for tactical and administrative message flow and ties between sensor, data processing, launch, and guidance control subsystems
b. Communications may interface with existing fixed communication facilities or communication subsystems of launch platforms, which are associated systems to the missile system

NOTE 1: If lower level information can be collected, use the structure and definitions in Appendix B, Electronic Systems. NOTE 2: All effort directly associated with the remaining Level 3 WBS elements and the integration, assembly, test, and checkout of these elements into the Command and Launch element is excluded.

C.4.4.5 Launcher Equipment. The means to launch the missile air vehicle from stationary sites or mobile launch platforms.

Includes, for example:
a. Vehicles, rail launchers, canisters, capsules, tubes, pods, and devices, which support, suspend, or encase the air vehicle for firing. Such devices would be in addition to any encasement, if applicable, integral to an air vehicle
b. Associated hardware such as umbilicals, harnesses, pyrotechnics, and electronics
c. Storage facilities and checkout stations for readiness verification when these are integral to the launcher
d. Safety and protective elements when these are not integral to the launch platform or site facilities

NOTE 1: If lower level information can be collected, use the structure and definitions in Appendix B, Electronic Systems. NOTE 2: All effort directly associated with the remaining Level 3 WBS elements and the integration, assembly, test, and checkout of these elements into the Command and Launch element is excluded.

C.4.4.6 Auxiliary Equipment. The general purpose/multi-usage ground equipment utilized to support the various operational capabilities of the command and launch equipments, which is generally excluded from other specific Level 3 elements.

Includes, for example:
a. Power generators, power distribution systems, environmental control, cabling, malfunction detection, fire prevention, security systems, and other common-usage items not applicable to specific elements of the ground based equipment

NOTE 1: If lower level information can be collected, use the structure and definitions in Appendix B, Electronic Systems.

NOTE 2: All effort directly associated with the remaining Level 3 WBS elements and the integration, assembly, test, and checkout of these elements into the Command and Launch element is excluded.

C.4.4.7 Command and Launch Software Release 1…n. All command and launch software not associated with a specific Level 3 element.

NOTE: Refer to Appendix B, Electronic Systems for further breakout and definitions for Software.

C.4.4.8 Other Command and Launch 1…n (Specify). This element comprises the complex of equipment, not included in the above Level 3 elements, that is unanticipated at the time of issuance of this appendix due to the evolution of technology but necessary to complete this Level 2 element.

C.4.5 Missile System Software Release 1…n. All Missile System software not associated with a specific Level 2, Level 3 or Level 4 element.

NOTE: Refer to Appendix B, Electronic Systems for further breakout and definitions for Software.

C.4.6 Missile System Integration Assembly Test and Checkout. This element includes all effort of technical and functional activities associated with the design, development, and production of mating surfaces, structures, equipment, parts, materials, interconnect harnessing and software required for the integration, assembly and checkout of the above Level 2 elements into their Level 1 element, Missile System.

C.4.7 Common WBS Elements. Definitions for Common WBS elements applicable to the Missile System, and all other defense materiel items, are in Appendix L: Common Elements, Work Breakdown Structure and Definitions.