MIL-STD-881F — Work Breakdown Structures for Defense Materiel Items
Source: MIL-STD-881F, 13 May 2022 (US DoD; public domain; Distribution Statement A per ASSIST QuickSearch Dist Stmt for Rev F) | Chapters: 7
When to use
Use this pack when building or reviewing a defense Program or Contract WBS: choosing commodity appendices, applying the 100% rule, writing WBS dictionaries, placing software/cyber/SoS work, hanging Appendix K common elements, aligning IMP/IMS and cost reporting identifiers, implementing post-award WBS control, or applying Appendix L sustainment CES / Appendix M Government ST&E structures under 881F.
Prerequisites: none — plain Markdown; no MCP server, API key, or licence tier needed at runtime. Pair with program cost/CSDR guidance and service tailoring memos for reporting specifics.
How to Use This Skill
- Without arguments — load the core frameworks below.
- With a topic — ask about Program vs Contract WBS, 100% rule, dictionaries, a commodity appendix, common elements, sustainment L, or software placement.
- With a chapter — ask for
ch01 through ch07.
Supporting files: glossary.md, patterns.md, cheatsheet.md.
Core Frameworks & Mental Models
Three-layer WBS spine
- Program WBS (Government) — whole materiel item / PE
- Contract WBS — performer extension of program parents
- Subcontract WBS — lower-tier extension with same product parents
100% rule
Decomposition children must represent 100% of parent work/resources. Never promote a child to sibling of its former parent for 'visibility'.
Commodity + commons pattern
| Layer |
Source |
| Product taxonomy |
Appendices A–J |
| Enabling commons |
Appendix K (A–J only) |
| Sustainment CES reporting |
Appendix L |
| Government ST&E |
Appendix M |
Dictionary discipline
Every managed element needs definition, inclusions, exclusions—this is interface control for cost, schedule, and engineering.
Software dual path
- Embedded on weapon equipment → prefer equipment parent (elevate only if unpartitionable)
- IS/Defense Business Systems → Appendix J
Pre-award → post-award flow
Program WBS + dictionary → RFP extension requirements → Contract WBS CM → reporting levels ≤ definition depth → L/M where applicable.
Chapter Index
| # |
Section |
Key content |
| ch01 |
WBS Principles and Definitions |
Purpose, PE/materiel item, 100% rule, dictionary, layers |
| ch02 |
Program WBS, Roles, Pre-Award |
Government construction, RFP, pitfalls |
| ch03 |
Contract WBS and Programmatic Issues |
Extension, SoS, cyber, software, IMP/IMS |
| ch04 |
Commodity Templates A–F |
Aircraft, electronics, missile, strategic, sea, space |
| ch05 |
Commodity Templates G–J |
Ground, unmanned maritime, launch, IS/DBS |
| ch06 |
Common Elements (K) |
SE/PM, ST&E, training, data, SE, facilities, spares |
| ch07 |
Implementation, Reporting, Sustainment |
Numbering, CSDR, Appendix L CES, Appendix M |
Topic Index
- 100% rule / parent-child integrity → ch01, ch03
- Aircraft WBS (Appendix A) → ch04
- CAPE Sustainment CES / Appendix L → ch07
- Common Elements / Appendix K → ch06
- Contract WBS extension → ch03, ch07
- CSDR / reporting levels → ch07
- Cybersecurity placement → ch03
- Dictionary → ch01, ch02
- Electronics / avionics / generic (B) → ch04
- Government ST&E / Appendix M → ch07
- Ground vehicle (G) → ch05
- IMP / IMS linkage → ch03
- Information Systems / DBS (J) → ch05, ch03
- Launch vehicle (I) → ch05
- Missile / ordnance (C) / strategic (D) → ch04
- PM / measurement / EVMS mapping → ch07
- Program Element / defense materiel item → ch01
- Program WBS / pre-award / RFP → ch02
- Sea systems (E) → ch04
- SE/PM / SEIT/PM → ch06
- Software placement (embedded vs IS) → ch03, ch05
- Space systems (F) → ch04
- Subcontract WBS → ch03
- System of Systems / Family of Systems → ch03
- Technical planning & WBS → ch01, ch02, ch07
- Training / data / support equipment elements → ch06
- Unmanned maritime (H) → ch05
Supporting Files
- glossary.md — core 881F WBS terms with chapter refs
- patterns.md — eight build/review patterns with trade-offs
- cheatsheet.md — appendix picker, checklists, smells
Scope & Limits
- Covers MIL-STD-881F WBS standard practice only (13 May 2022 text used at build).
- Does not replace CAPE CSDR manuals, service-unique WBS memos, or contract clauses.
- Synthesized reference notes; not a substitute for the official ASSIST publication for contractual citation.
- No source PDF or full-text redistribution in this pack.
1---2name: mil-std-881f3description: Knowledge base from MIL-STD-881F (13 May 2022), DoD Standard Practice for Work Breakdown Structures for Defense Materiel Items. Use for Program/Contract/Subcontract WBS construction, 100% rule and dictionary discipline, commodity appendices A–J, Common Elements (K), sustainment CES reporting (L), Government ST&E (M), and RFP/post-award implementation. Technical planning & WBS and PM/measurement focus—not a cost manual substitute for CAPE policy.4---56<!-- argument-hint: [WBS, Program WBS, Contract WBS, 100% rule, dictionary, appendix A-J, common elements, sustainment, CSDR, IMP/IMS, software placement, or chapter number] -->78# MIL-STD-881F — Work Breakdown Structures for Defense Materiel Items9**Source**: MIL-STD-881F, 13 May 2022 (US DoD; public domain; Distribution Statement A per ASSIST QuickSearch Dist Stmt for Rev F) | **Chapters**: 71011## When to use12Use this pack when building or reviewing a **defense Program or Contract WBS**: choosing commodity appendices, applying the 100% rule, writing WBS dictionaries, placing software/cyber/SoS work, hanging Appendix K common elements, aligning IMP/IMS and cost reporting identifiers, implementing post-award WBS control, or applying Appendix L sustainment CES / Appendix M Government ST&E structures under 881F.1314**Prerequisites:** none — plain Markdown; no MCP server, API key, or licence tier needed at runtime. Pair with program cost/CSDR guidance and service tailoring memos for reporting specifics.1516## How to Use This Skill17- **Without arguments** — load the core frameworks below.18- **With a topic** — ask about Program vs Contract WBS, 100% rule, dictionaries, a commodity appendix, common elements, sustainment L, or software placement.19- **With a chapter** — ask for `ch01` through `ch07`.2021Supporting files: `glossary.md`, `patterns.md`, `cheatsheet.md`.2223## Core Frameworks & Mental Models2425### Three-layer WBS spine261. **Program WBS** (Government) — whole materiel item / PE 272. **Contract WBS** — performer extension of program parents 283. **Subcontract WBS** — lower-tier extension with same product parents 2930### 100% rule31Decomposition children must represent 100% of parent work/resources. Never promote a child to sibling of its former parent for 'visibility'.3233### Commodity + commons pattern34| Layer | Source |35|-------|--------|36| Product taxonomy | Appendices A–J |37| Enabling commons | Appendix K (A–J only) |38| Sustainment CES reporting | Appendix L |39| Government ST&E | Appendix M |4041### Dictionary discipline42Every managed element needs definition, inclusions, exclusions—this is interface control for cost, schedule, and engineering.4344### Software dual path45- Embedded on weapon equipment → prefer equipment parent (elevate only if unpartitionable) 46- IS/Defense Business Systems → Appendix J 4748### Pre-award → post-award flow49Program WBS + dictionary → RFP extension requirements → Contract WBS CM → reporting levels ≤ definition depth → L/M where applicable.5051## Chapter Index52| # | Section | Key content |53|---|---------|-------------|54| [ch01](chapters/ch01-wbs-principles-and-definitions.md) | WBS Principles and Definitions | Purpose, PE/materiel item, 100% rule, dictionary, layers |55| [ch02](chapters/ch02-program-wbs-roles-and-preaward.md) | Program WBS, Roles, Pre-Award | Government construction, RFP, pitfalls |56| [ch03](chapters/ch03-contract-wbs-and-programmatic-issues.md) | Contract WBS and Programmatic Issues | Extension, SoS, cyber, software, IMP/IMS |57| [ch04](chapters/ch04-commodity-wbs-air-missile-sea-space.md) | Commodity Templates A–F | Aircraft, electronics, missile, strategic, sea, space |58| [ch05](chapters/ch05-commodity-wbs-ground-umms-launch-is.md) | Commodity Templates G–J | Ground, unmanned maritime, launch, IS/DBS |59| [ch06](chapters/ch06-common-elements-appendix-k.md) | Common Elements (K) | SE/PM, ST&E, training, data, SE, facilities, spares |60| [ch07](chapters/ch07-numbering-reporting-sustainment.md) | Implementation, Reporting, Sustainment | Numbering, CSDR, Appendix L CES, Appendix M |6162## Topic Index63- **100% rule / parent-child integrity** → ch01, ch0364- **Aircraft WBS (Appendix A)** → ch0465- **CAPE Sustainment CES / Appendix L** → ch0766- **Common Elements / Appendix K** → ch0667- **Contract WBS extension** → ch03, ch0768- **CSDR / reporting levels** → ch0769- **Cybersecurity placement** → ch0370- **Dictionary** → ch01, ch0271- **Electronics / avionics / generic (B)** → ch0472- **Government ST&E / Appendix M** → ch0773- **Ground vehicle (G)** → ch0574- **IMP / IMS linkage** → ch0375- **Information Systems / DBS (J)** → ch05, ch0376- **Launch vehicle (I)** → ch0577- **Missile / ordnance (C) / strategic (D)** → ch0478- **PM / measurement / EVMS mapping** → ch0779- **Program Element / defense materiel item** → ch0180- **Program WBS / pre-award / RFP** → ch0281- **Sea systems (E)** → ch0482- **SE/PM / SEIT/PM** → ch0683- **Software placement (embedded vs IS)** → ch03, ch0584- **Space systems (F)** → ch0485- **Subcontract WBS** → ch0386- **System of Systems / Family of Systems** → ch0387- **Technical planning & WBS** → ch01, ch02, ch0788- **Training / data / support equipment elements** → ch0689- **Unmanned maritime (H)** → ch059091## Supporting Files92- [glossary.md](glossary.md) — core 881F WBS terms with chapter refs93- [patterns.md](patterns.md) — eight build/review patterns with trade-offs94- [cheatsheet.md](cheatsheet.md) — appendix picker, checklists, smells9596---9798## Scope & Limits99- Covers MIL-STD-881F WBS standard practice only (13 May 2022 text used at build).100- Does not replace CAPE CSDR manuals, service-unique WBS memos, or contract clauses.101- Synthesized reference notes; not a substitute for the official ASSIST publication for contractual citation.102- No source PDF or full-text redistribution in this pack.
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