Gantt LWC - Reschedule Completed Tasks Setting

Last Modified On: September 25, 2025

Project Tasks marked as Completed, no longer impact scheduling. Changes to Predecessor dates do not reschedule the Completed task or its Successors.

There may be instances, however, where project managers may want to reschedule completed tasks such as:
 

1. Delayed Predecessor Impacts

   • A task was marked as Completed early, but its predecessor task later gets delayed. With Reschedule Completed Tasks enabled, the completed task and its successors automatically adjust, keeping the overall schedule accurate.

   • Benefit: Ensures downstream tasks stay aligned with actual project realities.
      

2. Re-baselining After Scope Changes

   • Midway through the project, scope changes require reworking earlier tasks that were already marked Completed. By enabling rescheduling, the system realigns the timeline without needing manual adjustments.

   • Benefit: Saves time and reduces errors when reforecasting project schedules.
      

3. Keeping Historical Accuracy

   • If a project manager prefers that completed tasks remain fixed to preserve the historical record, the setting can be left unchecked (default).

   • Benefit: Provides flexibility to choose between schedule accuracy and historical consistency, depending on project needs.

A project setting, Reschedule Completed Tasks (checkbox), gives project managers control over how completed tasks interact with scheduling and successor dependencies:

• When TRUE: Completed tasks continue to reschedule based on changes in the Predecessor chain, and their successors adjust accordingly.

• When FALSE (default): Completed tasks do not impact scheduling, maintaining the current behavior.

This flexibility helps project managers maintain realistic schedules when task completion timing changes, while still allowing the option to keep completed tasks locked if preferred.

Please note:

• If the Reschedule Completed Tasks checkbox isn’t visible in Project Details, contact your Salesforce System Administrator to ensure you have access and that the field has been added to the project page layout and/or Lightning record page.
   
• This feature is only available in the Gantt Lightning Web Component (Gantt LWC) and not available in Gantt Visualforce (Gantt VF).

1. Open the project and go to the Details tab.
   
   
    
2. Click on the Edit icon beside Reschedule Completed Tasks and set to:
   
   TRUE: If you want completed tasks to continue to reschedule.
   FALSE (Default): To keep completed tasks as they are. Changes to the project start date or its predecessors do not reschedule the complete task or its successors.