Planning and scheduling complex projects
When a project is under way, Gantt Charts help you to monitor whether the project is on schedule. If it is not, it allows you to pinpoint the remedial action necessary to put it back on schedule.
Sequential and parallel activities:
An essential concept behind project planning is that some activities are dependent on other activities being completed first. As a shallow example, it is not a good idea to start building a bridge before you have designed it!
These dependent activities need to be completed in a sequence, with each stage being moreor-less completed before the next activity can begin. We can call dependent activities ‘sequential’ or ‘linear’ for which gnatt chart is one the useful tool.