good-enough/core-docs/good-enough-4u0-supply-side.md

Good Enough 4u0 — Supply-Side Commons

File: good-enough-4u0-supply-side.md

Purpose

Harness leftover and salvaged materials as raw input—without making them a fragile dependency.

Two Supply Categories

1. Opportunistic Salvage (One-Time)

• Shop leftovers: lumber, metal offcuts, plastics.
• Construction salvage: glass, tiles, fixtures.
• Industrial junk streams.
• Rule: Cannot be the essential anchor. Always list a repeatable substitute.

2. Perennial Secondary Markets

• Garage sales, flea markets, thrift stores, liquidation.
• Common discards: shelving, office chairs, plastic tubs.
• Rule: Acceptable as semi-stable source if turnover is predictable.

Documentation Requirements

• Material class, not brand. (“Aluminum offcut, ≥5 mm” not “6061 from X shop.”)
• Substitution note. Identify what standard material could replace it.
• Hazard check. Call out risks (treated lumber, tempered glass, lead solder).

Integration with Design

• Salvage = enhancement, not anchor. Anchors must remain plentiful COTS.
• Builders must be able to finish the design without the exact salvage find.