Recorded Changes in Design

The revisions made in the part print must be carefully studied. Any failure in checking the revisions can cause costly manufacturing mistakes. Quite often revisions are made at the request of process engineer. The reason for revising drawings may be to correct errors, reduce cost, improve manufacturing methods, improve the existing design, facilitate inspection, improve quality and many others.

Any change in the design must be checked out completely before the process can be planned because of the effect they may have on the operational sequence, tooling, locating system and overall manufacturing economy.

Majority of components are either made up from an assembly of individual parts or become a part of another assembly. Hence, it should be standard practice in seeking out revisions to check all other drawings related to the given part to determine how the revisions tie in.