Calculation for piping man-hour is a very complicated task. Many factors have to be considered to arrive at the correct amount that will ensure the company will not lose money in the contract and met the required target completion date on implementation of the job.
A Piping estimator is required to have knowledge in productivity rates and norms regarding piping works so that he can do the job easily and without errors that may cause large money or job delays.
In piping estimating man-hour it is necessary for the piping estimator to know all the tasks and activities needed to complete the job. Piping estimation will require not only your piping job site experience but also your talent in doing all kinds of piping calculations.
If you want to have a background on what is involve in piping estimation, you can see the piping man-hour estimation form sample here. You can see some data which you may also use as norms if you are now looking for norms to use in you piping project estimation. We understand that estimating, planning, scheduling is very hard if you don’t know any correct or reasonable norms to base your estimate or schedule.
Just guessing for the norms will just result to big problems on your side. Unreasonable man-hours would be on your schedule and during the progress of the project unattainable deadlines starts to appear. The project will show that it is delayed based on your schedule which was based on incorrect norms, The proponent or the client may start rising questions why the project is delayed based on your schedule and those questions can be really hard to answer if you know that your schedule was based on wrong assumptions.
This is a sample template and computation in making a piping estimate Manhour. This manual computation is for Man-hour cost. For piping materials estimate can be done by use of piping estimating software which can make piping estimating more accurate.