Daniel: The inside cover of J-STD-001A and page vi of IPC-A-610B show the synopsized relationship of the two documents. Page v of IPC-A-610B is even more explicit: "J-STD-001 establishes the minimum acceptability requirements for printed board assemblies soldering. IPC-A-620, when addressing soldering is a companion and complimentary document, providing pictorial interpretation of the requirements of J-STD-001." It goes on to note: "The IPC-A-610 has additional criteria defining handling, mechanical requirements, and other workmanship requirements." Either spec can be used when invoked by customer or contractual agreement. A-610 may be used as a standalone document for inspection, but keep in mind that it doesn't specify the frequency of in-process or end-product inspection, nor the allowable number of repair/rework defects. These are found in -001. Mike Buetow IPC Technical Staff 2215 Sanders Road Northbrook, IL 60062-6135 T: 708-509-9700 F: 708-509-9798 [log in to unmask] On Tue, 24 Oct 1995, Daniel F. Shea wrote: > We are in the process of standardizing our assembly standards > for pwa's. Should we be referencing IPC-A-610 or ANSI/J-STD-001 > or both. There is a lot of duplication between the two. > Thanks > > dshea@sentry