Configuration Management: Can you reinstate a superseded revision

[ETrow]

Should/can you reinstate a superseded revision once the next revision has been released? ECO was released (ex: Rev A to Rev B) but now engineers (per customer) want to "obsolete" the ECO and revert back to previous revision (rev A). How do you properly handle revisions?

 

[IRstuff]

I think it would be cleaner to go to a Rev C, reinstating Rev A, with the rationale that Rev B was dud. This would give you a traceability and a record of why Rev B is not valid, rather than erasing Rev B, only to possibly wind up wasting time revisiting and recreating Rev B once all the parties in the know are no longer around to explain why that's not appropriate

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[YTMezoan]

Good question. Given that you want to make Rev B obsolete, you probably need to advance to Rev C.

 

[CWB1]

Software rules aside, yes. Revisions are just iterations, there's no good reason why you cannot have more than one in production simultaneously.

 

[dik]

Contractually you can reference Rev A... IRS's solution is cleaner and probably less confusing and less prone to error, in case someone 'accidentally' comes across Rev B, and uses it in lieu of Rev A thinking it is the latest.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[ETrow]

My thoughts too. Cleaner way would be revise to Rev C. Thanks so much for the backup.

 

[dik]

...great mimes think alike.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[1503-44]

Must explain why I favour Rev C. Note the previous originals as void.

 

[IRstuff]

We also used to use something called Design Decision Record (DDR) that went into more detail than the typical Engineering Change Notice (ECN) form allows. DDRs are free-form, so you can include lots of text, calculations, etc. that justify a change. A Rev C ECN would rescind Rev B and reference a DDR to explain why.

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