Difference betweenFEEDand DetailedEngineering

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FEED engineeringdeliverables

The documents to be issued are more or less like basic or detailed design but how much information must be supplied? What is the difference between them? I mean how far we should go in to designing and giving details? Is there any codes or standards that I could refer to for more information?

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I have seen engineering companies take a risk by using the FEED to specify and purchase major equipment early in a project phase in order to save time and detail engineering – only to subsequently realize that the effort was a major mistake because of inherent project and scope changes later. Additionally, without detailed engineering done, a lot of project necessities were left unattended and major mistakes and omissions were made. Therefore, there may exist other interpretations or needs for a FEED through various parts of the world.