The Scheduled Start field indicates the date when work on a task is scheduled to begin as calculated by Microsoft Project, based on dependencies, constraints, calendars, and other scheduling factors. For a manually scheduled task (manually scheduled task: This type of task can be placed anywhere in the schedule without Project rescheduling it; it does not move as related information about the task changes.), this is the start date recommended by Project and is a read-only field. For an automatically scheduled task (automatically scheduled task: This type of task is scheduled using Project's scheduling engine, taking into account task constraints, dependencies, project calendars, and resource calendars.), the Scheduled Start date is the same as the date in the Start field.
Data Type Date (date field: A type of field whose content is a date. Examples include the Baseline Start and Early Finish fields.)
Entry Type Calculated or Entered (calculated or entered field: A field in which the value is determined by Project based on information in other fields. Information that you enter in the field yourself overrides calculated values.)
How Calculated Project calculates the Scheduled Start field based on task dependencies, constraints, the project calendar, and any task calendars. If resources are assigned, Project also considers the resource calendar and assignment units.
If you enter an actual start date that is different from the scheduled start date, Project changes the Scheduled Start date to match the date in the Actual Start field.
Best Uses Add the Scheduled Start field to a task sheet to review scheduled start dates as calculated by Project for all tasks, whether automatically or manually scheduled.
Example You need to filter for all start dates scheduled after April. You add the Scheduled Start date to the table portion of the Gantt Chart view and then filter on the field to see only those tasks with a scheduled start date beyond April 30.
Remarks If you enter a scheduled start date for an automatically scheduled task, Project assigns a Start No Earlier Than constraint (constraint: A restriction set on the start or finish date of a task. You can specify that a task must start on or finish no later than a particular date. Constraints can be flexible [not tied to a specific date] or inflexible [tied to a specific date].) to the task and uses your entered start date as the constraint date. If you have set your project to schedule from the finish date, and if you enter a start date, Project assigns a Start No Later Than constraint to the task.