Engineering change notice (ECN)
Also called: ECN, ECO, engineering change order
The formal notice that a part’s design has changed, stating the new revision, the reason and when it takes effect.
An engineering change usually moves through a request (ECR), an order that approves it (ECO) and a notice that tells everyone affected (ECN). The notice states the new drawing revision and the cut-in: the lot, serial number or date from which the change applies.
Suppliers, toolmakers, quality and planning all need it.
Where it goes wrong
The notice often reaches a supplier’s account manager but not its tool room, quality team or sub-suppliers, and parts keep shipping to the old revision.
What Spurby does
Sends the change to everyone who makes or checks the part, and catches a PO, ASN or drawing still on the old revision after the cut-in.
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