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When Your Component Is Unavailable: Alternates, Last Buys, and Counterfeits
5. Reducing These Problems at the Design Stage
The three situations this guide addresses are all significantly harder and more expensive when they arise reactively under
production pressure. Alternate qualification is harder when no alternate was identified at selection. The last time buy quantity
decision is harder when the component was selected without an EOL assessment. Counterfeit risk is most acute when no
alternate exists and a non-authorized source is the only option.
None of these situations can be fully prevented. Components go EOL faster than they once did, allocation events are not
always predictable, and forecasts are uncertain. But lifecycle status, multi-source availability, predicted years to EOL, and
form-fit-function cross references are all available at part selection. Making that data visible during design, rather than after a
sourcing problem occurs, reduces both the frequency and the severity of supply chain disruptions later in the product
lifecycle.
The most resilient designs are usually not the ones with the lowest initial BOM cost. They are the designs built with visibility
into lifecycle risk, sourcing flexibility, alternate availability, and long-term maintainability before the board ever reaches
production. Supply chain resilience is no longer just a procurement problem. It has become part of the engineering design
process itself.
Tools such as OrCAD X CIP and SiliconExpert help bring lifecycle status, sourcing intelligence, and alternate part visibility
directly into the design environment so these decisions can be evaluated earlier, when changes are still inexpensive and
manageable.
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