01 · QUESTION / INTENT
Create a controlled alternative without assuming form, fit and function equivalence.
02 · DIRECT ANSWER
Start with a requirement and interface gap analysis between the incumbent and the exact CALB model. Classify gaps by design, validation, compliance, quality, supply and commercial impact; then run document review, samples, pack/BMS integration, pilot lots and approval gates. Second source means approved alternative—not untested interchangeability.
03 · DECISION TABLE
| Decision factor | Decision direction | Confirm before approval |
|---|---|---|
| Equivalence | Separate must-match interfaces from performance trade-offs. | Electrical, dimensional, thermal, mechanical and software gaps. |
| Validation | Reuse evidence only where scope and conditions truly match. | Gap-based DVP&R with sample, pack and pilot gates. |
| Supply | Qualify continuity and change control, not a one-time sample. | Factory, capacity, lead time, allocation, PCN and contingency. |
04 · ENGINEERING EXPLANATION
Freeze a golden interface specification and identify which pack parts, cooling plates, busbars, firmware limits and calibration data change. Run worst-case tolerance and ageing analysis before pilot release.
05 · APPLICATION / MARKET MAPPING
A greenfield platform can accept a wider redesign; a field replacement or late-stage project needs tighter interchangeability. The commercial value of second source depends on when it enters the design lifecycle.
06 · EVIDENCE AND TEST CONDITIONS
- Signed gap matrix and risk-based validation plan.
- Approved model/site/lot evidence and ongoing change-notification process.
07 · RISKS / NOT SUITABLE WHEN
- Do not relabel a procurement alternative as a technical drop-in.
- Late qualification can consume savings through tooling, validation and project delay.
08 · FAQ
Must both sources use the same BMS limits?
Only if evidence proves a common safe envelope; otherwise use controlled source-specific calibration.Can one pilot lot approve serial supply?
Usually no; approval should include production-representative lots and ongoing incoming controls.BUYING COMMITTEE ANSWERS
Engineering
Owns interface gaps and DVP&R.Procurement
Owns commercial resilience, allocation and transition terms.Quality
Owns site/lot approval and dual-source consistency controls.Compliance / Logistics
Owns document and route requalification.Finance / Project
Compares savings with validation, tooling, delay and inventory costs.Management
Sets the resilience objective and latest useful decision gate.10 · PROJECT CTA