I believe that Gantt charts are great to keep you in focus with what your deliverables, milestones and project scope should be. In my industry experience, I’ve used Gantt charts to address CAPAs and NCRs. The CAPAs would require a due date set by corporate and you would plan accordingly so that you don’t get stuck with a few headaches down the line. With respect to supplier non-conformitties, it definitely helps the supplier side to provide them with some sort of timetable that they should adhere to. A capable user of the chart should be able to see things in the future that may require more or less attention. If I had anything to attribute to the way I used to do the charts, it would be to give yourself, if you have that luxury, 2x the time to finish the task + 10% more time than you really need. Note that a properly made Gantt chart/project should not make you feel rushed to complete a task.