| name | nasa-hsi |
| description | Knowledge base from NASA Human Systems Integration (HSI) Practitioner's Guide (NASA/SP-2015-3709). Use for HSI process implementation, lifecycle phase activities, function allocation, ConOps development, HSI Plan writing, HSI metrics (MOE/MOP/TPM/KPP), HITL testing strategy, HSI team organisation, scaling/tailoring for program size, and V&V planning. Does not cover the specific human engineering design standards (NASA-STD-3001 content) or detailed HFE methods beyond what the guide itself provides. |
NASA Human Systems Integration (HSI) Practitioner's Guide (NASA/SP-2015-3709)
Source: NASA (US Government work, public domain) | Chapters: 9
When to use
Use this skill when planning, scoping, or executing HSI within a NASA systems engineering lifecycle — from first concept studies through decommissioning. It answers "when do I do what", "what products are due at which milestone", and "how do I scale HSI to my program size." It is the practitioner's process companion, not a human factors design reference; for specific ergonomic or human performance standards, consult NASA-STD-3001 and the HIDH directly.
Prerequisites: none — plain Markdown; no MCP server, API key, or licence tier needed at runtime.
How to Use This Skill
- Without arguments — load the core frameworks below and the HSI lifecycle overview.
- With a topic — ask about ConOps, function allocation, HSI Plan, HITL testing, crew time KPP, COTS screening, V&V pre-declaration, lessons learned; I read the relevant chapter.
- With a phase — ask about "Pre-Phase A", "Phase B", "Phase D", "Phase E"; I provide the HSI activities and milestone deliverables for that phase.
- With a chapter — ask for
ch01 through ch09.
Supporting files: glossary.md, patterns.md, cheatsheet.md.
Core Frameworks & Mental Models
1. Four HSI Key Concepts (Ch 1)
- System = hardware + software + human — all three sub-systems have equal standing.
- All personnel, all lifecycle — users, operators, maintainers, trainers, logistics, ground control.
- Integration and collaboration — HSI resolves cross-domain conflicts before program management must engage.
- Early is mandatory — LCC is locked in during early phases; Pre-Phase A HSI yields the greatest cost savings.
2. NASA HSI Domains (Ch 1)
| Domain | Core Focus |
|---|
| Human Factors Engineering (HFE) | Capabilities/limitations → hardware/software design |
| Operations Resources | Flight and ground crew operations planning |
| Maintainability and Supportability | Maintenance design, logistics, spares |
| Habitability and Environment | Living/working conditions, health, environment |
| Safety | Hazard controls, human rating, survivability |
| Training | Instructional design, training resource minimisation |
3. HSI in the Systems Engineering Engine (Ch 3)
HSI runs in lock-step with the 17 NASA SEE processes (NPR 7123.1B). Key mapping:
- SEE 1–4 (Design): ConOps, function allocation, requirements, HITL-informed design
- SEE 5–9 (Realization): Prototyping, integration, HITL V&V, operations transition
- SEE 10–17 (Management): HSI plan, risk management, metrics, milestone reviews
4. Lifecycle Phase HSI Activities Summary
| Phase | Gate | Primary HSI Actions |
|---|
| Pre-Phase A | MCR | ConOps draft; function allocation; MOEs; HSI planning initiated |
| Phase A | SRR/SDR | ConOps baseline; HSI team formed; requirements baseline; MOPs/TPMs |
| Phase B | PDR | HITL intensified; requirements refined; V&V framework established |
| Phase C | CDR/PRR/SIR | Design finalised; production/training plans; V&V activities maturing |
| Phase D | TRR/SAR/ORR/FRR | V&V closure; Human Rating Certification Package; operational products |
| Phase E | PLAR/CERR/PFAR/DR | In-mission monitoring; lessons learned; sustaining engineering |
| Phase F | DRR | Decommissioning support; final knowledge archiving |
5. HSI Metrics Cascade
MOE (stakeholder satisfaction criterion, Pre-Phase A)
→ MOP (engineering-level measure, Phase A)
→ TPM (tracked margin, Phase A through Phase E)
→ KPP (program-level threshold/objective, e.g. crew time ≤40%/≤35%)
6. HSI Scaling (Ch 7)
| Scale | Safety | Human Involvement | Plan Format |
|---|
| Large | Category I / human-rated / life-sustaining | Tight coupling; crew "lives in the product" | Standalone HSI Plan |
| Medium | Category II / modest risk | Moderate coupling; crew essential | HSI in SEMP |
| Small | Category III / low risk | Loose coupling; some automation | Project documents |
Rule: Scale by safety and human involvement, NOT by budget.
7. HSI Plan Structure (Ch 8, Ch 9)
- Introduction (Purpose, Scope, Definitions)
- Applicable Documents
- HSI Objectives (System Description + HSI Relevance)
- HSI Strategy (Summary + Domains)
- HSI Requirements, Organisation, and Risk Management
- HSI Implementation (Activities, Products, Update Schedule)
8. Three Technical Authorities (Ch 2)
- ETA (OCE) → NPR 7123.1B; engineering design oversight
- SMA TA (OSMA) → NPR 8705.2B; safety and human-rating mandate
- HMTA (OCHMO) → NASA-STD-3001; health and medical standards
Chapter Index
| # | Section | Key content |
|---|
| ch01 | Introduction to HSI | Four key concepts, HSI domains, HFE/HCD/HSI distinctions, LCC motivation |
| ch02 | Implementing HSI | Three TAs (ETA/SMA/HMTA), control boards, IPT collaboration, HSI tools |
| ch03 | HSI in the SEE Engine | 17 SEE processes, Product Maturity Matrix, ConOps, function allocation, MOE→MOP→TPM |
| ch04 | Pre-Phase A and Phase A | MCR/SRR/SDR deliverables, HITL mockups, function allocation, HSI team formation |
| ch05 | Phases B and C | PDR/CDR activities, HITL intensification, V&V pre-declaration, design finalisation |
| ch06 | Phases D, E, and F | V&V closure, Human Rating Certification Package, operational monitoring, lessons learned |
| ch07 | Products, Scaling, Tailoring | Three-tier scaling, COTS assessment, crew time KPP, Agile integration |
| ch08 | HSI Plan Writing and Execution | HSI Plan structure, ConOps development, SME integration, requirements derivation, metrics |
| ch09 | Appendices: Plan, Checklist, Cases | Appendix A annotated outline, Appendix B checklist, Appendix C case studies (F-22, Shuttle, ISS, Constellation) |
Topic Index
- ConOps development → ch03, ch04, ch08
- COTS screening → ch07
- Crew time KPP → ch07, ch08
- Function allocation → ch03, ch04, ch08
- HITL testing → ch03, ch04, ch05, ch06
- HSI Plan writing → ch08, ch09
- HSI scaling and tailoring → ch07
- HSI team formation → ch02, ch04
- Lifecycle milestone deliverables → ch03, ch04, ch05, ch06
- LCC and cost avoidance → ch01, ch07, ch08
- Metrics (MOE/MOP/TPM/KPP) → ch03, ch08
- Phase D V&V closure → ch06
- Pre-declaration → ch05, ch06
- Requirements development → ch08
- SME integration → ch02, ch08
- Technical authorities → ch02
- Training domain → ch01, ch08
Supporting Files
- glossary.md — ~50 terms with chapter references, from CDR to V&V
- patterns.md — 13 reusable when/how/trade-off patterns for HSI practice
- cheatsheet.md — decision rules, milestone map, tells-and-smells, four key concepts
Scope & Limits
This skill covers the NASA HSI process and management framework as documented in NASA/SP-2015-3709: HSI lifecycle phases, SEE integration, product maturity, scaling, HSI Plan structure, metrics, V&V strategy, and program case studies. It does not cover the detailed engineering design standards in NASA-STD-3001 (human factors design requirements for space systems), the HIDH human performance data, or specific HFE analysis methodologies beyond what the Practitioner's Guide itself describes. This is a US Government public domain work (NASA); no copyright restriction applies.
