IFC / detail design / FEED 1

[RASST]

Dear all,
What is the difference between IFC (issued for construction) and detail design? How are these connected to FEED (front end engineering design)? Please help.

 

[thaidavid40]

Some of these terms are used rather loosely by engineers in various disciplines and locations around the States. However, here is my shot at trying to help define these:
1) "IFC" is the fully-completed design documents set, sealed and signed, and ready to permit and build from.
2) "Detailed Design" corresponds to the 95%-completion level of document development, ready for final client review and comment.
3) "FEED" corresponds to the 35%-completion level of document development (beyond initial concept design), ready for initial client review and comment.
Dave

Thaidavid

 

[IRstuff]

Thaidavid's description seems to roughly correspond to the following for aerospace product development:
preliminary design - conceptual design solid enough to confirm that requirements are being met
critical design - detailed design that requires minor drawing completion, but is otherwise ready for procurement
technical data package - finalized design package typically delivered with the finished product.

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[cvg]

I would say that detailed design takes it from FEED through IFC including the 100% submittal and possibly other submittals for permits, etc.

 

[Gumpmaster]

Here's is my (somewhat limited) understanding of the terms:

FEL = FEED = SD = 30% = Preliminary Design = Bridging Documents

DD = 60%

IFB = 90%

IFC = CD = 100%


Notes:
There may be multiple FEL or FEED stages.
There is often a 90% stage to check a design prior to IFC.

SD/CD/DD are typically for building type jobs and are defined by the AIA (American Institute of Architects)
30%/60%/90%/100% is typically used in heavy civil construction. Heavy civil sometimes uses SD/CD/DD.

FEL/FEED/IFB/IFC are typically used in the oil, gas, & chemicals industry as well as other heavy industries.

Terms such as TDP and critical design are primarily used in the mechanical/aerospace industries


FEL = Front End Loaded
FEED = Front End Engineering Design
SD = Schematic Design
DD = Design Development
CD = Contract Documents
IFB = Issued For Bid
IFC = Issued For Construction
TDP = Technical Data Package