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Planview Customer Success Center

Setting Task Duration/Milestones

Duration is the total span of working time required to finish a task. Just enter the number of working days, weeks, hours or minutes a task will take to complete and PPM Pro will calculate the Start Date and Target Date. A task with a duration of 0 is automatically marked as a Milestone by the system. Milestone tasks appear as diamonds on the task Gantt chart.


Entering duration is the easiest way to establish Start and Target dates for a task. You can even set a task’s duration to zero days to set up milestones or checkpoints.

Note that working hours per day and week for your project are set on the project Details section, and these values are used when you enter any of these duration types for the duration of a task. For example, if your Default hours per day are 8, and you enter a duration of one day, then the duration of the task is 8 hours.

You can change the Duration of your task through several methods:

  • Enter in the Scheduling view Duration field - in Details tab and/or on grid

  • Manipulating the interactive Gantt Chart to change Start Date or Target Date whereby Duration will change

  • Updating Start Date and Target Date in the Scheduling view - in Details tab and/or on grid

You can enter the duration in weeks, days, hours or minutes. By default, the Duration is in days.   

Shortcuts for the Duration type are:












For example, if you want to set the Duration to 3 days, simply enter “3d” or “3” in the Duration field and hit enter. The task Target Date will calculate according to the Duration you set and the Gantt chart will be updated as well.

Entering Duration in the Scheduling view

  1. Navigate to MyProject/Tasks and select the task whose duration you want to set.
  2. Click the Details tab.
  3. Enter the duration of the task.


  1. Click Save.