Changes made to plans are automatically synced to any runs with those plans that are not yet in progress. Testers haven’t yet seen these plans, so the changes shouldn’t affect them yet.
For runs that are in progress, whether or not you can update the plans depends on whether testing has started.
You cannot make changes to plans that have In Progress tasks in the run. Testers keep the old version of the plan.
If a plan does not have In Progress tasks in the run and you make changes to the plan, the run shows you the option to sync the latest changes into the run. You can sync individual plans or all plans with changes.
When you decide to sync a plan, you are asked to confirm the changes.
After you confirm the changes, the plan is checked to see if any changes are made to the estimated time to complete the plan. What happens next depends on if there are any changes to the estimated time:
No changes to the estimated time: all tasks are updated.
Any changes to the estimated time: all tasks within the plan are cancelled and reallocated.
As part of this, you have the option to bypass the availability limit of already allocated executors. Note that this does not guarantee that the originally allocated executor will be reallocated the task.