Comparing JavaScript PERT Chart and Gantt Chart | by JavaScript UI  Libraries — DHTMLX | Medium

Gantt chart is the simplest and most commonly used investment management tool. Provides clarity in the order of activities over time. The disadvantage is that there is no dependence between individual activities.
This shortcoming has been corrected in a number of more advanced tools based on the so-called “pert” method, which shows the dependence of certain activities during the implementation of the investment. By clicking on the circles, you also get information about the duration of the activity, the necessary investments, the necessary workers, equipment, etc.