ETC Changes / Moves when Start/Fnish date changed for task


Article ID: 192395


Updated On:


Clarity PPM On Premise Clarity PPM SaaS


When ETC period time scale is configured to be by month:
  • The Start date will be set to the first of month if ETC is assigned
  • Finish date will be set to the end of month if ETC is assigned.
  • The issue happens when the user tries to change the start date back to its original date say 6/15:
    • The ETC for 6/20 will change.
    • Same thing for finish date.


  • This is working by design
  • When adding ETCs in the Time scale for a period, it will distribute it among all working days within the time period


Release : All Supported Releases



  1. To add ETCs to a specific day (days) - change the Time Scale view to daily then add the ETC within the daily view
    • This will then help prevent the need to change assignment start/finish dates and ensure ETC stays in the assigned days as much as possible
  2. A few other options that can help:
    • Option 1: Use auto schedule after adding the ETCs.
      • This can help bring the dates back in (and thus the ETCs) but is dependent on the resource's allocation % during the task duration.
      • If the ETCs are higher then the allocation this won't be something that would help.
      • The Project manager can test this functionality by creating a tentative schedule in the Clarity Gantt and validating the dates there.
    • Option 2: Add ETCs in the ETC totals column (but this would distribute it equally among the duration of the assignment)
  3. See also 130339 - Task Start/Finish Dates change when ETC is added to TSV

Additional Information

See KB: 141061 for tips on how to optimize use of Self Service for Clarity PPM