Interchangeability Checker

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Are my two items interchangeable?


FORM


Does appearance of both items meet all esthetic requirements of Product Specification?


FIT


Do both items fit with other mating items per drawing dimensions and tolerances resp. software interface?


FUNCTION


Do both items meet all functional requirements of Product Specification?


OLD <> NEW


Are these criteria met both ways (old in the new and vice versa) with no special measures to the item or related items, and in all applications?


The items are INTERCHANGEABLE!


Continue to find out if you should assign a new part number or just increase revision level of the document.


The items are NON-INTERCHANGEABLE!


Continue to find out if you should assign a new part number or just increase revision level of the document.


Have superseeded items already physically been made?


Have superseded items already been ordered?


Can superseded items, if any exist, be reworked and will they be interchangeable with the superseding item?


Will all superseded items (incl. FRU/CRU) be reworked, and can they all be found and controlled through the rework process?


Is end-item, source or content traceability required?


Can traceability be achieved without changing the part number?


Does customer requires a new part number at all?


Do not change part number. Increase document revision level.


STOP


Assign a new part number to superseding item.


Go to parent item and repeat process until the existing part number is retained or the end-item is reidentified.

This tool is an online version of decision trees published by Jörg Eisenträger in his document Item Interchangeability Rules. See there for further explanations.