man-hours estimate for piping & equipment design
man-hours estimate for piping & equipment design
(OP)
Hi folks,
what is your approach to estimating man-hours for piping and equipment designers? Is there any realistic chart available?
Kind Regards,
Hahor
what is your approach to estimating man-hours for piping and equipment designers? Is there any realistic chart available?
Kind Regards,
Hahor





RE: man-hours estimate for piping & equipment design
You can break that down in 30% for project spec and 70% for detail design.
When you know an average manhour rate (all inclusive) divide it to the cost of engineering and you know rough the amout of manhours.
It is a rough system but it will help you to get an 25% acurate estimate.
Raymond Hagedoorn
Cost Engineer
RE: man-hours estimate for piping & equipment design
i use 8-12 as FEC ratio (Factor Engineering to Total Cost), ie engineering is in a range of 1/8 to 1/12 of total project cost (small/revamp closer to 8, large/grassroot closer to 12)
mech/piping take about 1/3 of that engineering cost, so 1/24 to 1/36 of total project
regards,
javier
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