{
  "schema": "vedokrok.public-item.v1",
  "release_id": "MHC-RPUB-20260920-75ad787a",
  "url": "/knowledge/pay-for-fit-where-your-body-meets-the-tool",
  "id": "MHC-D-RESEARCH-9053",
  "version": "0.1.0",
  "title": "Pay for fit where your body meets the tool",
  "summary": "For body-contact tools, specification sheets are weaker than a representative fit test.",
  "kind": "protocol",
  "body": "Define the fit problem before comparing tiers. Test the item in the posture, duration and workload that matter, then look for both the target benefit and a new trade-off. For a bed that may mean a realistic sleep trial and return path; for a chair, keyboard, shoes or headphones it means representative use rather than a five-minute impression. Pay for adjustability, fit or materials only when they improve the real interaction. Do not treat price, 'ergonomic' language or luxury branding as a medical claim.",
  "limits": [
    "Persistent pain, numbness, sleep problems or other symptoms can require professional assessment. A consumer trial is not a diagnosis or treatment test."
  ],
  "topics": [
    "union-interaction-weighted-purchases"
  ],
  "intents": [],
  "source_ids": [
    "RS-38FAB1598536D55D"
  ],
  "evidence": [
    {
      "claim": "Life-cycle cost analysis compares alternatives over a defined service period instead of treating the initial purchase price as the only cost.",
      "source_id": "RS-38FAB1598536D55D",
      "role": "contextualizes",
      "note": "The NIST method is designed for federal energy and building decisions; personal cost-per-use calculations are a simplified editorial adaptation.",
      "locator": "Life-cycle cost method"
    }
  ],
  "use_when": [
    "A high-use item has sustained body contact or changes posture, pressure, reach, grip, sleep surface or sensory load."
  ],
  "avoid_when": [
    "Persistent pain, numbness, sleep problems or other symptoms can require professional assessment. A consumer trial is not a diagnosis or treatment test."
  ],
  "example": "A premium chair that prevents close desk access can be a worse fit than a cheaper adjustable chair that lets the feet, desk, keyboard and pointer work together.",
  "check": "The keep decision is based on representative fit and an observed trade-off, not a showroom impression or therapeutic marketing.",
  "steps": [
    "Name the body-contact or fit problem before shopping.",
    "Choose a seller or product with a realistic adjustment, trial or return path where possible.",
    "Test representative duration and workload after a reasonable adaptation period.",
    "Track the intended benefit and one likely trade-off before deciding to keep it."
  ],
  "sources": [
    {
      "id": "RS-38FAB1598536D55D",
      "title": "Life Cycle Cost Manual for the Federal Energy Management Program",
      "url": "https://www.nist.gov/publications/life-cycle-cost-manual-federal-energy-management-program"
    }
  ],
  "relations": [],
  "collections": [
    {
      "id": "RC-74CA3FEDEC162686",
      "title": "Spend more carefully on the things that touch your life most",
      "url": "/collections/spend-more-carefully-on-the-things-that-touch-your-life-most"
    }
  ]
}