PERT chart also helps to identify the critical path of a project, the path, which determines the shortest time needed to complete the project. Whenever a deviation from the plan occurs, managers should pay most attention to the problems along the critical path. Once those activities are delayed, the whole project won’t be able to be completed on time. All the activities outside the critical path usually have so called “slack time”, which means that it is possible to delay this activity for some time, without affecting the whole duration of the project.
2. As step B is a part of the critical path, it is important to give its timely completion the highest priority, as it can delay the whole project. For activities C and D there should be some slack time, which gives an opportunity to complete the project on time even if C and D are delayed. Therefore, repairs in B should be taken up first, followed by C and D.
3. Repairs in C and D are prioritized based on their impact on the whole project flow. Whichever step requires a delay longer than its slack time should be started first, in order to avoid costly project delays.
Carpenter, C. (2006). Real world project management. Success Solutions Press. Envision Software. (2009, April 10). PERT diagram and CPM. Retrieved from http://www.envisionsoftware.com/articles/Pert_Chart.html
Luecke, R. (2004). Managing projects large and small. Boston, MA: Harvard Business School Publishing Corporation.