Contrary to the beliefs of the main gantt chart software packages, every project and every plan has its own special requirements.

Some project plans may require you to measure and manage effort for billing purposes.  Other plans may need minute based planning.  There are so many different requirements of project planning that it is difficult to build these into a single gantt chart tool.

This is where MS Excel has some very substantial advantages in preparing gantt charts.  The major, and o...