Gantt Charts are useful in this industry, particularly since they describe and monitor all types of projects being carried out. I agree with your bullet points about the factors to put into consideration when preparing Gantt Charts. If those points are not followed in creating Gantt Charts, then they may not be effective. From experience, I’ve learned that creating a Gantt Chart from scratch is not an easy task. The hardest part, in my opinion, is linking the tasks so that they can be carried out in a specific order, especially where one is needed to add lag or lead times. However, once all the tasks have been linked, If all the factors you mentioned are taken into consideration in the preparation of Gantt Charts, effective Gantt charts will be developed.