Redacted layout showing CTQ callouts, datums, and how pass/fail is stated.
Case study • CTQ evidence • Export-ready delivery
Case Study: 316 Stainless Clamp Component (Passivation + Documentation)
An anonymized stainless clamp component where finish expectations, traceable documentation, and CTQ reporting supported a U.S. medical-adjacent program.
Program snapshot
Customer: Medical-adjacent equipment team (U.S. program; name withheld)
Part: 316 stainless clamp-like component used in a controlled environment
Why it mattered: Stainless machining plus finishing requirements can create receiving disputes without clear documentation
SEMIX role: Machining execution, finishing coordination, CTQ inspection evidence, and documentation
| Field | Details (public) |
|---|---|
| Material / finish | 316 stainless |
| Size envelope | Anonymized (available under NDA) |
| Qty range | Prototype to low-volume programs (anonymized) |
| CTQ focus | Datums + functional features (CTQs defined at RFQ) |
| Tolerance & verification | Tight/critical features verified on CTQ-focused report (ranges shared under NDA) |
| Lead time | Quoted per RFQ; schedule aligned to customer gate dates (ranges under NDA) |
| Evidence pack | CTQ report • CoC • material/finish certs (as applicable) • packaging notes |
Key requirements
| Area | Requirement |
|---|---|
| Material | 316 stainless with controlled machining and handling |
| Finish / treatment | Passivation or surface treatment as required (scope defined at contract review) |
| CTQs | Fit and functional features verified and reported |
| Documentation | CoC + CTQ inspection report; MTR when required |
| Packaging | Protective packaging to prevent surface damage |
How we executed
SEMIX approached the build as a controlled workflow: confirm CTQs, plan measurement methods, and prevent revision drift.
- Contract review: clarified treatment scope, acceptance criteria, and documentation requirements.
- Machining plan: executed with attention to burr control and feature integrity.
- Inspection plan: mapped CTQs and produced a receiving-friendly report.
- Finishing coordination: aligned finishing requirements and maintained traceability.
- Packaging: protected surfaces and labeled by revision/PO line.
Quality evidence and documentation
To make receiving easy for a U.S.-based program, we shipped with evidence aligned to CTQs and revision control.
- CTQ inspection report aligned to functional features
- CoC and optional MTR (as required) with traceability
- Finishing documentation aligned to the agreed scope
- Protective packaging to preserve surface condition
Evidence pack preview (redacted)
On request, we can share redacted examples of the exact report formats our U.S. buyers receive—so your receiving team knows what to expect.
Revision- and PO-linked CoC format used for receiving acceptance.
Redacted packaging notes for protection, labeling, and kitted shipments (if applicable).
Outcome
- Receiving and quality review simplified by a complete documentation package
- Surface condition preserved through packaging discipline
- CTQ evidence enabled smooth acceptance for follow-up builds
Outcome metrics are anonymized. The point is the workflow: stable routing, CTQ measurement, and receiving-ready documentation.
Outcome highlights
Evidence formatted for receiving review; CTQs highlighted to reduce back-and-forth.
CTQ inspection plan executed; CoC and required certs packaged with the shipment.
Delivery and documentation aligned to the customer’s internal gate / PO flow-down.
Deep dive (technical briefs)
If you want the engineering rationale behind the controls used in this program, start with these related briefs from our Technical Academy:
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ISO 25178 Areal Surface Texture | Beyond Ra for Functional Interfaces
How to use ISO 25178 areal (3D) surface texture parameters to control sealing, friction, vacuum compatibility, and particle risk—beyond simple Ra specifications.
Read the full brief
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Decision Rules with Measurement Uncertainty | ISO 14253‑1 + ILAC G8 + GUM
Applied guide to uncertainty-based decision rules: guard bands, false accept/reject risk, and dispute-proof statements of conformity for precision CNC machining suppliers serving U.S./EU buyers.
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Gauge R&R for High‑Precision CNC | Practical Execution (NIST‑Aligned)
How to design Gauge R&R for tight-tolerance machining: artifact selection, fixturing, temperature discipline, CMM strategy, and actions that improve measurement reliability for U.S./EU buyer programs.
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Acceptance Sampling for Machined Parts | ANSI/ASQ Z1.4 vs Z1.9
Applied acceptance sampling for CNC machining: when to use ANSI/ASQ Z1.4 (attributes) vs Z1.9 (variables), how switching rules work, and how to align sampling with CTQ risk for U.S./EU buyers.
Read the full brief
Evidence patterns (technical case studies)
Incident-style write-ups that show how SEMIX handles common failure modes and prevents receiving disputes:
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Case Study (Aerospace): Late‑Batch Reject Spike | Wear‑Driven Regime Change
Rejects appeared late in the batch. Root cause was wear-driven cutting regime change shrinking stability margins. Fix used wear gating plus EWMA/CUSUM drift detection.
Read the case
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Case Study (Semiconductor/Vacuum): Flatness Dispute Solved | Thermal State + Decision Rules
Flange flatness passed at supplier but failed at customer. Root cause traced to thermal-state mismatch and missing uncertainty-based decision rules. Includes corrective actions and reporting template.
Read the case
Documentation templates (print-to-PDF)
Want consistent receiving-ready evidence? These templates show typical formats SEMIX can provide with shipments (redacted samples available under NDA):
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Certificate of Conformance (CoC) template
Buyer-friendly CoC with clear scope, drawing revision reference, and statement of conformity.
Open template
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Inspection plan (CTQ) template
Characteristic table with method, sampling, decision rules, and reaction plans—built for high-trust programs.
Open template
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Final inspection report template
A report structure that reduces disputes: conditions, CTQ highlights, and declared decision rules.
Open template
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Packaging & shipping checklist template
Packaging spec, label control, photos, and shipment signoff for export-ready delivery.
Open template