Hypergravity-Habitat

Requirements Traceability Matrix

Project: Hypergravity Habitat
Document type: requirements traceability matrix
Status: initial framework
Scope: links scientific, engineering, safety, ethics, and demonstrator requirements to verification methods and current documents

1. Purpose

This document provides a traceability structure for the Hypergravity Habitat project. It connects requirements to their source, design response, verification method, and current status.

The purpose is to make the project reviewable:

A reviewer should be able to see where each requirement comes from, which document addresses it, and how it could be verified.

2. Status Definitions

Status Meaning
open requirement identified but not yet addressed
drafted addressed in documentation but not verified
modelled supported by calculation or simulation
testable demonstrator or verification method defined
verified evidence exists
deferred later-stage requirement
rejected no longer part of current scope

3. Requirement Categories

Prefix Category
SCI scientific requirement
PHY physics/model requirement
BIO biological payload requirement
HUM human-subject requirement
ENG engineering requirement
SAF safety requirement
ETH ethics/governance requirement
DAT data-management requirement
ECO economic/programme requirement
DEM demonstrator requirement

4. Traceability Matrix

ID Requirement Source document Design response Verification method Status
SCI-001 Define the research gap before architecture selection research-gap.md, facility-comparison.md annotated review and facility comparison expert review drafted
SCI-002 Distinguish acute response from adaptation scientific-questions.md exposure-duration taxonomy protocol design drafted
SCI-003 Use low-risk early payloads before human studies minimum-useful-demonstrator.md payload-first strategy demonstrator plan drafted
PHY-001 Use vector-corrected resultant gravity model preliminary-sizing.md, physics-reference.md equations and sizing script code review, calculation check modelled
PHY-002 Calculate radius, speed, angular rate, and bank angle preliminary-sizing.md hypergravity_sizing.py script output modelled
PHY-003 Model Coriolis effects for projectile tasks literature-review.md, sports-science.md coriolis_projectile_deflection.py script output and later 3D model modelled
PHY-004 Analyse track cant, carbody tilt, cant deficiency, and low-speed cant excess for railway concepts engineering/tilting-train-and-cant-limits.md, engineering/railway-platform.md cant/tilt feasibility requirement railway dynamics model and expert review drafted
BIO-001 Include matched 1 g biological controls biology.md, plant-science.md payload protocol requirement demonstrator protocol drafted
BIO-002 Log environmental variables for biological payloads data-management-plan.md, vibration-and-confounders.md metadata and sensor requirements data package review drafted
BIO-003 Prevent contamination and define sample handling ethics-and-governance.md biosafety and handling plan biosafety review open
HUM-001 Defer human studies until safety and ethics exist ethics-and-governance.md, roadmap.md staged roadmap governance checkpoint drafted
HUM-002 Define medical stop criteria before exposure human-physiology.md, safety-case-outline.md medical governance requirement ethics/medical review open
HUM-003 Treat sports training claims as hypotheses sports-science.md evidence-level language document review drafted
ENG-001 Measure acceleration and vibration continuously design-requirements.md, vibration-and-confounders.md instrumentation requirement sensor calibration and test run drafted
ENG-002 Define safe state for each demonstrator safety-case-outline.md safe-state requirement integrated test open
ENG-003 Compare architecture options before selection architecture-trade-study.md trade-study matrix expert review drafted
ENG-004 Do not claim railway target-g capability from radius and speed alone; include cant, tilt, wheel unloading, low-speed/stopped condition, and clearance analysis engineering/tilting-train-and-cant-limits.md cant/tilt analysis as railway gate criterion railway expert review and vehicle-track simulation drafted
ENG-005 If proposing a full-ring vehicle, analyse global ring load path, local support unloading, guideway capture, stopped-state behaviour, thermal expansion, maintenance, and emergency access engineering/full-ring-vehicle-concept.md full-ring architecture treated as separate concept class annular-structure simulation and expert review drafted
SAF-001 Maintain a risk register risk-register.md risk categories and mitigation periodic review drafted
SAF-002 Define emergency stop/shutdown concept safety-case-outline.md safety requirement demonstrator test open
SAF-003 Define fire and power-loss response safety-case-outline.md hazard sections safety review open
ETH-001 Require ethics approval for human studies ethics-and-governance.md governance checkpoint institutional approval drafted
ETH-002 Apply 3R principles for animal research ethics-and-governance.md animal research governance animal ethics review drafted
DAT-001 Use reproducible calculation scripts data-management-plan.md, calculations/README.md Python scripts in repository code review drafted
DAT-002 Define metadata for demonstrator runs data-management-plan.md metadata requirements template and dataset audit drafted
DAT-003 Protect sensitive human data data-management-plan.md, ethics-and-governance.md privacy requirements data protection review open
ECO-001 Use staged cost model, not full facility estimate cost-model.md staged cost framework funding review drafted
DEM-001 Define minimum useful demonstrator minimum-useful-demonstrator.md payload-first recommendation expert review drafted
DEM-002 Include stop/go criteria roadmap.md, minimum-useful-demonstrator.md decision tables milestone review drafted

5. Verification Methods

Possible verification methods:

6. Missing Verification Artifacts

The following artifacts are still needed:

  1. metadata template,
  2. acceleration and vibration CSV schema,
  3. biological payload protocol template,
  4. safety test checklist,
  5. expert-review questionnaire,
  6. architecture scoring sheet,
  7. cost sensitivity spreadsheet or script,
  8. diagram set for physics and roadmap,
  9. railway cant/tilt calculation model,
  10. vehicle-track dynamics review for rail concepts,
  11. full-ring vehicle load-path and stopped-state model.

7. Maintenance Rules

8. Preliminary Conclusion

The requirements traceability matrix turns the repository from a set of documents into a reviewable system. It should become the central checklist for future development, especially if the project is prepared for academic feedback or funding review.

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