A critical job is consistently late

A job that is defined as critical is consistently late despite promotion mechanisms being applied to it and its predecessors.

Cause and solution:

Using the successful predecessors task, compare the planned start, the actual start, and the critical start of all the predecessors of the late job. Check if any of them have time values that are too close together or have a planned start time that is later than the critical start time.

In such a case, you can:

Consider changing the timings of these jobs. For example, postpone the deadline if possible, or if the deadline must be maintained anticipate the start of some of the jobs.
Consider redesigning your job streams to optimize the paths that are causing delays.
Increase the value of the promotionOffset global option, so that jobs are promoted earlier.
On the workstations where jobs are tending to be late, increase the jm promoted nice (UNIX™) and jm promoted priority (Windows™) local options, so that promoted jobs receive more system resources.