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Percentage of Man-hours

4 replies [Last post]
Mirza Imam Baig
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Can any one express their expertise views on the following matter?

For DESIGNING a Commercial / Residential or Industrial Building (G + 2) including the external area around the structure, what could be the Percentage of Man-hours for each discipline? Say 100% represents the Complete Design, What percent each discipline will contribute approximately????


o Architectural
o Structural
o Mechanical (HVAC & Plumbing)
o Electrical
o Communication
o Civil (Landscaping, Irrigation, Sewer and Drainage system)
o Management (Project Management, Scheduling & Support)

I highly appreciate your inputs.

Thanks and Regards,

Imam Baig


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To have a rough guide, the % of cost and duration for the activities can be considered seperately. Then by comparing the 2 figures, you can decide what weightage to give for the activities. Any other suggestion from others?
Anand Kulkarni
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Yes it’s really very fluid based completly on the project size and overall cost.

But individually package wise cost comes in picture later on only.

Yes architect’s comsumes maximum time but only thing is that maximum of time is overlap with construction.

I think dividing all the packages in 4 stages with typical sequence & obvious overlaps will be better.

Thing is what are details required from which agency & at what stage, which will kick-off working for the other agencies & susequently the other stage of the plan holds the key.

1) Concept drawings: 15-25 % (Project)

2) Detail Engineering drawings: 25-60% (Packages)

3) G.F.C. drawings: 50%-80% (Packages)

4) Shop floor drawings: 80%-100%

Jaco Stadler
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For industrial project it depends what your are building they are alway’s different.

o Structural - 10 % to 90 %
o Mechanical (HVAC & Plumbing) - 10 % to 90 %
o Electrical 10 % to 90 %
o Communication 10 % to 90 %
o Civil (Landscaping, Irrigation, Sewer and Drainage system) 10 % to 90 %
o Management (Project Management, Scheduling & Support)
4 % to 24 %

Waseem Saber
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hi imam,

this can be based on the two factors 1st the cost of all the indivdual disciplne summed and get the weighted factor for all the discipline on the overall-100% and other way is to summed all the design elements of the project and allocate/ the time neccessary to produced the outcome,the time required to produced the architecture dwgs may vary from that of the structure design, as it is directly link to the amount of the complexity of the project and the detailing required, unless you define these factors it is difficult to assess the situation and allocate the weighted factors.

calling the PPers on the same wave length to respond and share their experiences Pl[.....]ase.

waseem saber