Tiering Logic
We separate critical features from secondary geometry so inspection stays focused.
- Critical feature tagging
- Tiered inspection scope
- Risk-based sampling
Capabilities
Tolerance Tiers
Tiered tolerances drive inspection depth, routing complexity, and risk exposure.
Assembly Stability
Tight tolerance tiers protect assembly fit and repeatability.
- Stack-up risk review
- Thermal drift considerations
- Process control alignment
Tolerance Tier Matrix
Match tolerance bands to inspection depth and risk.
Evidence ToleranceUse CaseInspection
Standard +/- 0.05 mmGeneral fitCritical dims only
Tight +/- 0.01 mmPrecision fitFAI + sampling
Critical <= +/- 0.005 mmHigh-risk fitCMM + full trace
Inspection follows tolerance
We align inspection depth and routing controls to the tiered risk.
SIG-01Standard+/- 0.05 mm
SIG-02Tight+/- 0.01 mm
SIG-03Critical<= +/- 0.005 mm
Tier Fit
Standard
General Fit
Balanced cost and inspection scope.
Tight
Precision Fit
Controlled inspection and routing.
Critical
High-Risk Fit
Full trace and dedicated controls.
Tier Evidence
Evidence artifacts mapped to tolerance risk.
EVIDENCE PACK TIER MAP
Critical feature listTier tagsInspection scope
Tier Map
Critical features and tolerance tiering summary.
PDF NOTES
Critical feature listTier tagsInspection scope
INSPECTION PLAN
Sampling cadenceMeasurement methodRelease checks
Inspection Plan
Sampling cadence tied to tolerance tier.
FAI CMM PDF
Sampling cadenceMeasurement methodRelease checks
FULL TRACE
CMM reportFAI reportDeviation log
Full Trace
Expanded metrology for critical tiers.
CMM FAI XLS
CMM reportFAI reportDeviation log
Submit for Tolerance Tier Review
Share tolerance targets to align tiering and inspection depth.