Manhoures

my view is both direct and indirect labour costs be taken into consideration.
For plant cost, how about to work it out from it’s life cycle (ie inital purchase + consumable + periodic maintenance; devided by it’s life period)?

Let start with the easy part.
The second point. In Your schedule You will have two summary bars (hammocks or Wbs), one for all the time related items and the other for fix costs (independent from the time) that You will load all Your indirect costs (management, offices, etc )
About the second point I normally use to split in two. I assign the major equipment to the relevant construction activities (cranes, trucks, …) and the minor one (pumps, …) to the summary bar. This really depend a lot from the kind of construction You are doing. May be for You the welding machine is a key/major equipment.
About the first point, the people assigned to the project, are enough to complete it in due time? I mean the construction manager told You that he will employee on site not more of 3 gangs (for example) it is enough? This You should analyse and point out if the case.
All the info You have are also congruent with the bid?
I do not the Your case, but normally a Client will not accept Your baseline if the physical quantities, manpower and equipment hours will differ from the bid.

I prefer to divide the complete manpower into three areas:

Direct
Indirect
Cost Centres / Rentals

The Direct manpower is assigned to the activity and hence the manhours are fixed i.e. they are based on production rates.

The Indirect manpower is time based and can be tabulated separately

The Cost Centres such as labour camps, production units, workshops etc. are supplying a service or a product and hence the manpower assigned therein is monitored separately. This can include the crane or other equipment operators if the rentals are inclusive of the drivers/operators.

The equipment assignment depends on usage. I prefer most of major plant and equipment in the common equipment pool as they work on more than one activity, such as tower cranes etc. The equipment for an activity should be assigned if it is meant solely for that activity.

With this categorization you can satisfy most manpower / manhours queries.

Ok You estimate the hours need to install the 20” pipes as per productivity.
I suppose You have a resource man-hours in Your schedule and You loaded it.
In the same way for the crane You have to add a resource and load it, it could be number of cranes or equipment-hours.
The operator should go in the man-hours. You can not load the crane hours in the man-hours!

Thanks Luca

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