Slack Date

The slack date field in Workfront should calculate correctly. This would allow you to see how close a task is to critical path. Currently, Slack Date will equal the projected completion date if the task has successors. This happens with both critical and non-critical tasks. It does not work as described on Workfront’s support site.

https://support.workfront.com/hc/en-us/articles/216636478-Understanding-Slack-Date

In the example below, Task B should have a different slack date. The task is not on critical path and can be delayed 5 days before impacting Task D.