Avoiding Redesign After Discontinuation: When Sourcing Is the Better Choice

When a key component is discontinued, many engineering and purchasing teams instinctively reach for a hardware redesign. But a redesign is not a quick fix – it consumes resources, takes time, and carries its own risks. In many cases, targeted sourcing or stocking of the discontinued component is the more economically sound decision.

What a Redesign Really Costs

The direct and indirect costs of a hardware redesign are regularly underestimated during the planning phase. You need to account for:

• Engineering effort: Circuit adaptation, layout changes, component selection and verification – often several person-months.
• Prototypes and pilot runs: Material costs, production time, and iterative test cycles.
• Requalification: Functional tests, environmental tests, and EMC testing must be repeated for the revised assembly.
• Certifications: In regulated industries – aerospace, medical technology, automotive – a changed PCB variant can trigger full re-certification, which takes months and generates significant costs.
• Production downtime or delivery delays: Until the new revision is released, production of the affected device may be halted.

When Sourcing Is Preferable to a Redesign

The "source or redesign" decision depends on several factors. Sourcing is generally preferable when:

• the remaining product lifetime is shorter than the time needed for a redesign (typically 12–36 months to series production),
• sufficient residual stock is available on the market or through brokers to cover your requirements,
• the certification costs of a redesign exceed the premium sourcing cost,
• engineering capacity is tight and more urgent projects are in the queue.

A redesign makes sense, on the other hand, if the product will be manufactured for many more years, no functionally equivalent replacement component exists, or long-term sourcing costs would be prohibitive. See also the overview of Obsolescence Management Strategies.

Decision Matrix: Four Key Questions

A structured assessment helps to objectify the decision:

1. Remaining product lifetime: Under 3 years – evaluate sourcing. Over 5 years – seriously consider a redesign.
2. Market availability: Sufficient residual stock available – sourcing is more economical. Market exhausted – redesign or component matching required.
3. Certification and regulatory burden: High – prefer sourcing. Low – redesign is more straightforward.
4. Engineering resources: Available and scheduled – redesign is feasible. Fully loaded – sourcing keeps production going without a resource conflict.

The Bridge Strategy: Sourcing Until the Planned Redesign

Often neither an immediate redesign nor unlimited stocking is the optimal solution. The bridge strategy combines both approaches: you secure sufficient stock of the discontinued component in the short term to sustain ongoing production, while simultaneously starting the redesign with an adequate time buffer.

For bridge sourcing, specialised service providers that can quickly tap into global warehouse and broker sources are invaluable. Submit a no-obligation enquiry if you want to check the availability of a discontinued component.

Conclusion