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As Soon As Possible

Using As Soon As Possible

As Soon As Possible is a task constraint that places the start time of the task as close to the beginning of the project as possible.

As Soon As Possible is the default constraint if a project uses a schedule mode of "Schedule from Start Date" and if the system default start date for a new task is set to "Based on the Project Planned Date."

If a project uses a schedule mode of "Schedule from Start Date" and if the system default start date for a new task is set to "Today", then the default constraint for a new task is Start No Earlier Than.

To understand where to set the default constraint for a new task, refer to "Tasks and Issues Preferences."

You can find the Task Constraint field either under the Edit Task panel, or the Task Details tab, inside a task object. 

Understanding the Difference between Earliest Available Time and As Soon As Possible

[! This section is duplicated in "Earliest Available Time"]The Earliest Available Time constraint differs from the As Soon As Possible constraint when all of the following criteria exist:

  • The project is Scheduled From Completion.
  • Tasks in the project have a predecessor relationship.
  • The predecessor task has a flexible task constraint.

In this situation:

  • Earliest Available Time: Using the Earliest Available Time constraint on the successor task gives priority to the predecessor's flexible constraint.
    For example, suppose that Task A is a predecessor to Task B. Task B has the Earliest Available Time constraint and Task A has the As Late As Possible constraint. In this situation, the task is scheduled as close to the completion of the project as possible.
  • As Soon As Possible: In this scenario, using the As Soon As Possible constraint on the successor task gives the priority to the successor task.
    For example, suppose that Task A is a predecessor to Task B. Task B has the As Soon As Possible constraint and Task A has the As Late As Possible constraint. In this situation, the task is scheduled as close to the start of the project as possible.