Calculation of budgeted units in prima vera

that depends on how your activities are broken down. For example I can have RFP slab level one as an activity or I can have it as 3 separate activities. 

so in one activity I am forming, installing rebar and pouring the slab. So here I can add 3 separate resources to one activity and the the resources would be the carpenter for the forming part, installing rebar would be iron workers, pouring would be the laborers. Each would have different manhours to do their task. 

or I can have 3 separate activities

forming - x # of days and carpenter X# of hours

rebar - x # of days and iron workers X# of hours

pouring concrete - x # of days and laborers X# of hours

Zoltan,

of course it makes sense to use three activities that have have different measures of work done and require different resources.

I understood the original question as seeking an advise on using resource productivity and activity volumes of work to calculate planned activity duration in P6.

Zoltan 

thanks for your reply.

In your answer here what i have understood

my forming team has 3 persons and each 4 hours a day  so total hours 12. 

Similarly rebar team has 12 hours also

the activity duration is 2 days

so budgeted units will be 48 ? Am i right?

Do not make the separation of crews mandatory, even if their work is measured on different units. When spreading the resources into separate activities desired/planned contiguous work might be separated by the resource leveling.  The following figure illustrates such a case.

Keeping the resources under the same activity will keep their work contiguous as shown in the next figure.

It is very common in such cases to assign different crews different workloads at the team level. Usually the carpenters are assigned 100% while the other crews at a lower percentage. If you reduce the electricians workload from 100% to 50% both Elevated Salb activities could be executed at the same time. Usually this is more representative of actual assignments at the jobsite.

Ahmad,

You asked - ... here what i have understood my forming team has 3 persons and each 4 hours a day  so total hours 12. Similarly rebar team has 12 hours also the activity duration is 2 days so budgeted units will be 48 ? Am i right?

You are right for all resources budgeted units will be 48, but still you must tell the software for each resource the budgeted units units/day; that is, if I understood your schedule then budget units for each resource would be 24 hours [3 persons x [8 hours work day x 50% of workday] x 2 workdays] as you calculated, for units/day it should be either 50% or 4h/d. In this way the calculations for activity durations will be as expected and you will get a detailed resource distribution.

Keep in mind it is not good practice to use a single resource to represent all unless they have the same skill sets, same unit cost, same calendar ...

Needless to say this does not necessarily solve a possible flaw I mentioned at another discussion.

• http://www.planningplanet.com/forums/oracle-primavera-pm6/582386/p6-resource-leveling-need-parallel-activities

As I do not have P6 so I would need some help of P6 users that can make some testing to see if there is or not such flaw.  These are very basic computations but still I would like to double check for the reasons I stated in the referenced discussion. This is an issue that not always comes to surface.

Good luck.