Why IEC 62402 Compliance Doesn’t Stop Obsolescence Surprises (And What to Do About It)

Your obsolescence management plan (OMP) exists and was written against IEC 62402; it passed the audit and was signed off without comment. So, on paper, it is protected.

Then, an end-of-life (EOL) notice lands on a component buried three levels down the bill of materials, and there is no listed alternative. The last time buy window is 90 days, finance has no budget line for it, engineering has never assessed a substitute, and the approved source will stop taking orders before your next OMP review meeting is even scheduled.

Compliance and protection are not the same thing. IEC 62402 requires a policy, a plan, and a risk-based approach, and unfortunately, it doesn’t make any of them work. In our experience supporting aerospace and defence supply chains, most obsolescence programmes are compliant on paper and reactive in reality. So here is why that gap exists and how to close it.

What IEC 62402 actually asks for

As many procurement managers will know, IEC 62402 is the international standard for obsolescence management. The current 2019 edition, which replaced the 2007 original, sets out what a credible programme should contain: an obsolescence management policy, supporting infrastructure and organisation, a documented obsolescence management plan, strategies to minimise obsolescence at the design stage, a risk-based management approach, a process for selecting and implementing resolutions, and measurement of how well all of it performs.

It is a sensible framework, and organisations that follow it are in a far better position than those that improvise. But the standard defines obsolescence as the transition of a required item from available to unavailable at the manufacturer. That transition does not wait for your annual plan review, and it does not care how tidy your documentation is.

Where compliant programmes fail in practice

The failure modes we see here at Rebound are remarkably consistent.

Risk assessments that never get refreshed.

The BOM  (Bill of Materials) was risk-scored at programme start, often years ago. Component lifecycles have moved on since, but the assessment has not. A plan built on stale lifecycle data is a historical document, not a proactive management tool.

Monitoring that stops at the top level.

Plenty of programmes track assemblies and line replaceable units diligently while the components inside them go unwatched. Obsolescence rarely announces itself at the assembly level. It starts with a single semiconductor, connector or passive device several tiers down.

“Proactive” that means subscribed, not prepared.

Receiving EOL alerts is not proactive obsolescence management. Acting on lifecycle forecasts before the alert arrives is. If your first knowledge of a discontinuation is the manufacturer’s notice, you are already inside the last time buy window with the clock running.

Resolution strategies that assume the franchise always has an answer.

Many plans list alternatives, redesigns and lifetime buys as resolution options, but quietly assume the authorised channel will hold stock indefinitely. On long-lifecycle defence platforms, it will not. When the approved source is gone, the plan needs a verified route to the open market, and most do not have one.

No funded mechanism for last-time buys.

The LTB is the single most time-critical resolution in obsolescence management, and it is routinely lost to internal processes. If securing budget takes longer than the buy window, the plan has failed regardless of what the audit said.

Storage as an afterthought.

A successful lifetime buy is only half the job. Components bought to cover 15 years of demand need controlled long-term storage, with the right environmental conditions and periodic inspection. Stock that degrades in a general warehouse is money spent to create a different problem.

Does your programme survive contact with reality?

Forget “are we compliant” for a moment and ask these instead:

• When was the full BOM last risk-scored against current lifecycle data, component by component rather than assembly by assembly?
• Do you have a funded, pre-approved mechanism that can execute a last-time buy inside a 90-day window?
• What is your verified route to stock when the approved source no longer exists?
• If you had to buy outside the franchised channel tomorrow, who would inspect the parts and to what standard?
• Where would a 15-year lifetime buy physically be stored, and under what conditions?

If any of those produce silence in the room, the gap between your documentation and your exposure is where the next surprise is coming from.

The operational layer under the compliance layer

This is where a specialist supply partner earns its place. The standard defines what good looks like; a partner provides the capability that makes it real when the manufacturer exits.

That means lifecycle monitoring across the full BOM rather than the top level, so risk data stays current. It means the ability to execute last-time buys quickly and provide managed long-term storage so the stock is still usable a decade on. It means alternate sourcing when the franchised route is exhausted, backed by inspection aligned to AS6081, the aerospace standard for counterfeit avoidance in open-market sourcing, so that recovered stock is verified rather than hoped for.

Rebound’s obsolescence management service exists precisely for this layer. As an AS9120B and AS6081 certified distributor, we are usually the call that gets made when the plan meets a discontinuation it did not predict. The programmes that handle those moments best are the ones that built the operational capability in before they needed it.

IEC 62402 compliance is worth having. It is just not the same as being ready. If you want a clear view of where your BOM risk actually sits today, talk to our obsolescence team before the next EOL notice decides the timetable for you.