Physical Progress

San,

That topic has been discussed countless times on this forum, so I won't hijack Moutaz's post to discuss it again here.

Follow this link to see my take on RL vs PO:

http://www.planningplanet.com/forums/planning-scheduling-programming-discussion/422165/retained-logic-or-progress-override

Good explanation Gary. yet another common mistake that people make is the selection regarding "retained logic "& progress override".

I prefer retain logic, though later has it's own importance.

Which one do you prefer and why?

Best Regards,

San

SM Pum:

Right.

But as I said below, I would also suggest that you set up a dummy project and progress a handful of activities using the different combinations of % complete types, remaining duration, resouces, earned value, etc. It should take you less than an hour.

Make sure you understand for yourself how these settings work and confirm for yourself that I have given you the correct advise.

Don't fall into the trap of assuming I or your "senior" planner or anyone else knows best until you have confirmed what they are saying yourself.

Gary Whitehead

Thanks for clearing the concept and correcting me.Till now i assumed that when we enter  Complete % (Usind Physical % Complete type), then remaining Duration is automatically changed and no need to change it.I have also seen our senior planner practicing same. So from now on I shall do the following,(Using Physical %)

1- Enter % Complete till DD.

2-Enter Remaining Duration.

3- Enter Actual resource units.

Right?

Regards,

Moutaz,

To calculate the early finish for each in-progress activity, P6 will use either:

1) The remaining duration you have typed in OR

2) The duration % complete you have typed in, to automatically calculate the remaining duration

The benefit of using duration % complete (Option 2 above) is that you do not have to calculate & type the remaining duration yourself

The benefit of typing the remaining duration yourself (Option 1 above), is:

a) The remainnig duration calculated by P6 may not be true (eg what if you add extra resources to accelerate an activity once it is 50% complete?)

b) You can use physical % complete to report Earned value metrics without it being affected by duration (eg what if a material delivery is 90% through it's duration, but you cannot claim any Earned Value until it arrives on site?)

In my view using Option 2 as the default is lazy planning. If you are blindly assuming that for all in-progress activities, remaining duration will be equal to remaining % complete * original duration, then I'm 90% confident you will have a poor forecast.

Time does not always = work.

Work does not always = progress.

SM Pum: Ayman IS correct.

Below quote is from Primavera help file:

"To update activities with Physical percent complete type, type the physical percent complete and the remaining duration for the activity. If resources are assigned, you must also update each resource’s actual regular units."

This is the whole point of using physical % complete instead of duration % complete -Just because 25% of the physical work remains, it does not necessairly follow that it will take 25% of the original duration. Using physical % complete allows & requires you to make that judgement yourself, whereas duration % complete does not.

I strongly advise anyone who is not absolutely confident they understand the differences between physical and duration % complete to spend some time reading the help file and playing with the options in a dummy project. You can get yourself and your project into an awful mess if you get this stuff wrong.
 

moutaz aldeib

Check your logic.Always try to use FS relationship with zero (Or positive lag as secondary option).Try to avoid FF and SS relationship.

Ayman Eleish , No what you have suggested is not right.

Best Regards,

Dear Moutaz,

I think if you use physical updating type you have to change the remaining duration as well,on contrary to the duration type in which the remaining duration is automatically updated based on the percent complete.

The program considered that the remaining duration as it was before i.e.4 days and added them to the DD.

Regards,