Obsolescence Management

Obsolescence Management is the post-launch process of detecting, anticipating, and responding to component-level end-of-life events while the product itself is still in production or service. It is the discipline behind the U.S. DoD SD-22 DMSMS guidebook, IEC 62402 (international DMSMS standard), and the long-life-product practices of aerospace, defense, rail, and industrial machinery — where production runs span decades but their semiconductor and electromechanical inputs go end-of-life every 3–5 years.

Scope

• Component health monitoring — automated obsolescence-risk scoring on every BOM line via supplier-disclosure feeds (SiliconExpert, IHS Markit, Z2Data, supplier portals).
• Last-time-buy (LTB) decisions — bridge-buy quantities, storage cost vs. risk trade-off, financial accruals for inventory.
• Alternates qualification — drop-in FFF equivalents, drop-fit / drop-form swaps, full redesign triggers.
• Strategic stock & banking — cold-chain or anti-static storage, shelf-life monitoring, periodic re-test.
• BOM remediation — re-spinning the BOM with successor parts, propagating changes through Change Management (ECO/ECN) and re-validating with V&V.
• Sustainment-cost forecasting — total-cost-of-ownership impact across the installed base; budget visibility to the customer for long-life programs.

Relationships (see sidebar)

• Realizes Supply Chain Resilience, TCO, and Regulatory Compliance (RoHS / REACH-driven obsolescence).
• Supported by AML, AVL, Part Master, Form, Fit, Function (FFF) Rule, Part Lifecycle Information (PLI), and Metadata Management.
• Distinct from End-of-Life Disposal (retiring the product); obsolescence-management is the EoL of components inside a still-shipping product.
• Closely coupled to Service & Maintenance (spare-parts continuity) and Supplier Development (alternate qualification).