CNC-021

Pack: B_CNC Severity: major

Tight positional tolerances without datum strategy → inspection/machining risk

Rule Card

Field	Value
Pack	B_CNC — CNC Machining DFM
Title	Tight positional tolerances without datum strategy → inspection/machining risk
Severity	major
Check logic	Hybrid
Applies to	CAD part
Inputs required	datum_scheme
Fix template	Adjust geometry/process for machine capability and setup risk.

Short Description

Tight positional tolerances without datum strategy → inspection/machining risk

When It Applies

This rule runs when the selected or auto-classified manufacturing route activates B_CNC. It targets CAD part.

Evidence Profile

Input	Category
datum_scheme	Drawing / Spec

References

Reference	Type	Title
REF-GPS-2	standard	ISO 1101:2017 — Geometrical product specifications (GPS) — Geometrical tolerancing — Tolerances of form, orientation, location and run-out

Sources

• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\manifest.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\rule_library.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\references.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\process_classifier.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\overlays.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\roles.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\report_templates.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\ui_bindings.json