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glossary

ECP (Engineering Change Proposal)

What is an Engineering Change Proposal (ECP)?

An Engineering Change Proposal is a formal request to change the design, configuration, or specification of a product after it has been put under configuration control. Once a baseline is set, you cannot simply alter the design on the fly; the ECP is the disciplined mechanism for proposing a change, documenting why it is needed, and capturing its effects before anyone acts on it.

What an ECP captures

A complete ECP describes the proposed change, the reason for it, and a full impact assessment: effects on cost, schedule, performance, interfaces, logistics, and any other affected items. Changes are typically classified by how significant they are, which drives how much review and approval they require. The point is that no one is surprised later by the downstream consequences of a change.

Why it matters to contractors

ECPs sit at the intersection of engineering and contracts. A change that affects the contract baseline usually flows into a contract modification, which means scope, price, and schedule can all move. Managing ECPs well protects you from performing changed work without proper authorization or compensation. It connects directly to your configuration control and to the bill of materials that defines the approved build.

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