Interchangeability Checker Are my two items interchangeable? FORM Does appearance of both items meet all esthetic requirements of Product Specification? ---YESNO FIT Do both items fit with other mating items per drawing dimensions and tolerances resp. software interface? ---YESNO FUNCTION Do both items meet all functional requirements of Product Specification? ---YESNO 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? ---YESNO 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? ---YESNO Have superseded items already been ordered? ---YESNO Can superseded items, if any exist, be reworked and will they be interchangeable with the superseding item? ---YESNO Will all superseded items (incl. FRU/CRU) be reworked, and can they all be found and controlled through the rework process? ---YESNO Is end-item, source or content traceability required? ---YESNO Can traceability be achieved without changing the part number? ---YESNO Does customer requires a new part number at all? ---YESNO 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.