Engineering Change Proposal
Engineering Change Proposal
(OP)
I am a contractor to the Air Force, Navy to build test cell for jet engines. I am asking if you know an Engineering Change Proposal process which we have never done in the past. How long will it take from Engineering stand point to verify drawing, approve by all staff members, and complete any estimate or engineering issues. Can anyone give me a breakdown of time (engineering)? Air Force is coming for an audit and they want to know the engineering estimate for ECP. Thank you.





RE: Engineering Change Proposal
You are asking total strangers to figure out how long your own process is supposed to take.
Your own people should be doing the estimate. If you've been careful, you would have built up some sort of charge number system that you can use as historical data for your estimate. Otherwise, you'll only be able to cite engineering judgement as your basis of estimate.
TTFN
RE: Engineering Change Proposal
I said that we have never done any ECP for company before as the statement. I am just asking for general estimate for any person has been through the process, they would understand and share with me their breakdown structure. I would appreciate your help anyway. Thank you.
RE: Engineering Change Proposal
For a very rough order or magnitude estimate you could take some percentage of the time to draw, check, and approve. What that percentage to use is open to considerable interpretation and judgement but, something like 15-25% may be an acceptable answer to your client. Of course, experience is the best basis for estimate.
As for how to accomplish an ECP I suggest you consult ASME Standard Y14.35, Revision of Engineering Drawings and Associated Documents (about $50 from ASME.org). Another very good source of guidance for drawings for the government is the Drawing Requirements Manual by Global Engineering Documents (about $200, over 1,000 pages from global.ihs.com).
RE: Engineering Change Proposal
RE: Engineering Change Proposal
Suerte, I asked this question back in July 2003. I am surprise that you reply to this one. However, it's still helpful from your share of experiences. I got laid off from that company a few weeks but now working on a different job. Again, thank you for all of your time.