Issue link: https://resources.pcb.cadence.com/i/1545418
What to Assess Beyond Status f Years to predicted end of life relative to the product's target service life. A component with a three-year predicted end of life on a product with a seven-year service life is a redesign waiting to happen. That decision should be visible at part selection, not discovered during a sustaining engineering review. f Lifecycle risk rating from an aggregated source that tracks market signals, not just manufacturer declarations. Manufacturers sometimes discontinue products without formal NRND designation, and aggregators that monitor distributor inventory trends and design registration patterns can surface this earlier. f Number of active alternate sources. A single-source active part carries higher lifecycle risk than a multi-sourced one even if both have identical status fields. f Historical pattern of the component family. Some manufacturers have consistent, well-communicated product lifecycle behavior. Others do not. f Market demand trends for the technology. Components in declining-demand categories face earlier obsolescence regardless of the manufacturer's current status declaration. Encoding Lifecycle Risk in the Library Lifecycle risk data should be stored at the part level and updated on a defined review cycle, not just at part creation. A component added two years ago with a low-risk rating may have a significantly different risk profile today if its market condi- tions have shifted. f Store a lifecycle risk rating alongside the status field using controlled vocabulary: Low, Medium, High f Record the date of the last lifecycle review separately from the date the part was added f Flag parts that have not been reviewed within a defined window, for example 12 months, for librarian attention f When a part's risk rating changes, notify design teams with active programs using that part so they can assess exposure and begin alternate qualification if needed Note: Instead of manually updating or flagging lifecycle risk connect to an active data source that will update and show current risk over time. 5. Build Multi-Sourcing Into the Library by Default Single-source components are a supply chain vulnerability embedded at the design level. When a preferred source becomes unavailable due to allocation, shortage, or discontinuation, a single-source part forces a choice between waiting and redesigning. Neither option is acceptable when a build date is fixed. Multi-sourcing strategy belongs in the library, not the BOM. By the time a BOM is submitted, it is too late to do meaningful alternate source qualification under production pressure. Defining alternate sources at part creation means procurement has options before a crisis, not after. Structuring Alternates in the Library A relational database schema allows multiple manufacturer part numbers to be associated with a single component record without creating duplicate entries that inflate the library. Each alternate must carry its own supply chain verification, separate from the primary part: f Electrical equivalence confirmed against the primary part specification, including all parametric tolerances, not just the top-level description f Footprint compatibility verified for each package variant. A functionally equivalent part in a different land pattern variant is not a drop-in alternate without re-verification. f Compliance status independently verified. Do not assume an alternate shares the compliance status of the primary part. f Lifecycle status assessed separately. An alternate that is also approaching end of life does not reduce risk. It adds a second expiration date. f Distributor information populated so procurement has immediately actionable sourcing options, not just an MPN to search 8 www.cadence.com Managing Your Component Library for Supply Chain Resilience