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Bottom-up Scheduling - Start Constraint for Project

Jun 26, 2017 at 03:03 AM

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Former Member

Hi Folks,

We want to use Bottom-up Scheduling for Project Management in PPM 6.0. While using Bottom-up Scheduling, the system assigns a mandatory Start Constraint date for the Project. When I try to change it to "No Constraint", the system does not accept it.

The goal is to assign a Must Start constraint on the last task of the Project and then have the system calculate Start and Finish dates for all tasks above it with Bottom up Scheduling including the Start Date of the Project.

Please advise if mandatory Start Constraint date for the Project can be removed in such a situation or what is the alternative..

Thanks

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1 Answer

Francesco Pezzoli
Jul 03, 2017 at 11:09 AM
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Hello,

It is compulsory to assign either a start constraint or a finish constraint on the project header , so you cannot leave both fields empty and let the system roll the relevant dates up from the task.

What you could however do is set a "soft" constraint on the project header (e.g. "finish no earlier than" and today's date). This way you can avoid setting a "must start on" or "must finish on" date, and you will be able to set the desired dates on the objects below the project header. Once you have set the required start constraint on the task further down the project hierarchy and you have scheduled the project, you may or may not want to remove the soft constraint on the project header and set a new start constraint in accordance with the dates which were calculated by the bottom-up scheduling.

Regards

Francesco

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