GM Names Names, Suspends Two Engineers Over Ignition-Switch Safety

cartechboy (2660665) writes "GM said it has placed two engineers on paid leave in connection with its massive recall probe of 2 million vehicles. Now, GM is asking NASA to advise on whether those cars are safe to drive even with the ignition key alone. Significantly, individual engineers now have their names in print and face a raft of inquiries what they did or didn't know, did or didn't do, and when. A vulnerability for GM: One engineer may have tried to re-engineer the faulty ignition switch without changing the part number—an unheard-of practice in the industry. Is it a good thing that people who engineer for a living can now get their names on national news for parts designed 10 years ago? The next time your mail goes down, should we know the name of the guy whose code flaw may have caused that?"

Comments

changing part without changing number is common

[Anonymous Coward]

I'm not saying that it's good, and this case is an example of exactly why it can be a bad idea to do this, but changing part numbers has a lot of overhead (inventory management of multiple part numbers, all the manuals that now refer to the wrong number, etc)

If it's expected that the new part is significantly different than the old one, then it's worth all the pain, but if it's not expected to be significantly different (just cheaper to build, or more reliable when nobody expects series reliability problems with the old one, etc) its not completely insane to just change the design and keep the same part number.

If you want to be really paranoid, you track each batch of parts produced as a separate item, because minor things like the temprature that day could theoretically affect something. In medical and aerospace industries, this sort of tracking is done (which is one of the reasons why 'simple' things are so expensive in those industries)

but in the automotive industry that level of tracking is just not done, and it's very common for parts to be substatuted with no notice.

In the computer industry, it's unfortuantly common for some manufacturers to make what many people consider major changes (like changing chipsets) without changing the part number.

David Lang

Re:changing part without changing number is common

[confused one]

Since I work for an automotive OEM.... When this is done, there is an Engineering Change Order documenting the change and why it was implemented. We don't change anything without first getting the approval of the customer; and, invariably they will want all the relevant DV and PV testing redone. Huge effort and pain. All of this is well documented and nothing ships until we have final approval from the customer.

The part number may not change; but, the part revision level will. PN 123456 RevA will become PN 123456 RevB. We treat it as the "same" part number but will only ship the latest revision once we have customer approval. As for tracking, I don't know how our customers tracks the change internally; but, I can tell you which batch, serial number, and date code the new revision started shipping.