Total float

It sounds rather like you have created a schedule running from Jul 15 07 through to Mar 8 09. When you change the start to be Sep 15 07, you are shortening the number of days available to do the job hence negative TF. You now need to work out how to do the job in the fewer days

All you have to do is to change the PROJECT MUST FINISH BY.

Regards..

You need to crunch the programme by reviewing the following:
- Duration
- Logic
- Relationship

Cheers

in addition to the above , you can review the resources and the daily productivity.

by increasing the recources the daily productivity will be increased and the duration will be decreased.

Thanks

Just wondering how clive figured out 12-15% resource increase by reducing 10% of duration? very precise. any relationships to calculate accurately resource increament vs schedule reduction?
cheers

Hi Nar
just remember you time at school. Reduction of 10% from 100 is calculated on basis 100, whereas increase of work up to 100 is on basis of 90, which makes 11,11. More persons need more leaders, admin, communication... - makes 12-15%
regards
Dieter

Its very simple to guess the problem.
Once you fixed the finish milestone date and you change the start date by a delay of 2 months, the float will be negative 51 working days or 60 calendar days.
Just reduce the durations of your critical (red color) activities by increasing resources where possible or change the logic of program to fix within time.
Contact the PM, he must help you.
Take care
Muhammad Jawad

Dante

The answer is as ever, communicate.

Ask the PM what gives - does the client milestone change, or is it the resources that must be increased. Once he has answered that one, assuming that the resources must increase, then as Clive says, make sure that you make sufficient allowance for the fact that doing things more quickly leads to inefficiency, so yes, allow something like 15% more resources to execute the critical activities 10% faster, then review the critical path, because it will have moved and other activities will need to be executed faster too. By the time you’ve done this three times you should be getting close to the correct answer.

Then when you give the answer to the PM, be prepared to pick him up off the floor because he will have agreed to the delay for no extra cost!!!!!

IN ADDITION TO ALL OF THIS YOU CAN ONLY CHECK THE CRITICAL ACTIVITIES, AND MAKE A GLOBAL CHANGE TO INCREASE THEIR RESOURCES BY 15 %. BEFORE INCREASING LL RESOURCES FOR ALL ACTIVITIES.

I AGREE WIHT MR. Naas "COMMUNICATION IS ESSENTIAL". IF THERE’S CHANGE THOSE WHO ARE DIRECTLY INVOLVE (STAKEHOLDERS) MUST SIT DOWN AND WORK FOR BETTER UNDERSTANDING OF THE SITUATION SO FROM THERE APT SOLUTION WILL COME.

REGARDS