I agree with Roland and to add it also depends on the type of project & contract you will be dealing with and usually the timing or frequency of updating and submission of the construction schedule are specified in the specification/general requirement of the project.

-This could be on monthly basis (use for monthly meeting, prior to submmision of monthly claims or as one of the attachement).
-On weekly basis (usually use for weekly progress meetings)
-On daily basis (Usually happen on a very detailed project, where if you will not update daily you’ll end up with hundreds or thousand of activities to update at the end of the week).

As for the duration, activities needs to be selected such that the duration is generally less than 21 callendar days.

Cheers hope this help.

Honestly Alan! Bipresh may not know that you are joking.

Schedule update periods obviously must be made in intervals greater than the planning unit (in this case, ’Days.’) The interval should be often enough to notice deviation and allow for correction but not so often that you are doing nothing more than statusing the project.

Rules of thumb also state that an activity should not be in-progress over two updates (although there are always exceptions.)

A majority of construction projects that are monitored in planning units of Days use a monthly update cycle to correspond with the progress payment cycle. If you have to note progress status for payment, you might as well note if for scheduling as well.

Some projects are statused every two weeks. A few projects (normally being overseen by the General Contractor and not an outside CM) monitor status weekly.

Good luck!