Here two cases scenario can be seen which will be treated in a different way:

 

  • Period of non-work
    Inability to install asphalt or landscaping during winter for example.

 

To allow this constraint to be reflected in the Ms Projet software, the easiest method will be to create a specific calendar (for example a calendar where no work is done during the winter) which will be assigned to the activities that cannot be done during the winter. 

 

 

  • Compulsory work period
    Obligation to do work for a specified period.

To reflect and control a specific time period where we need to work, we can use a constraint (milestone) and due date on the activity or final activity of a block.