Productivity Rates for Heavy Industry [ Petrochemical, Power Plant, Oil & Gas ]

Hello guys, I am currently working on a petrochemical project, and my previous orientation is from High Rise Civil Construction Planning, I was a Commissioning Engineer before in a power plant but I think that will not help me much to plan for a project on a similar nature.

So this comes down to my predicament of having to check the accuracy of the durations that I have on the Schedule which I finalized alongside our construction team, but based on their estimation only, So I was hoping there is a standard or a rule of thumb for this estimation for Man-Hour budgeting for materials and equipments for heavy construction.

Thanks again and may the force be with us.

 

Regards,

Mil