Program Evaluation and Review Technique - Disadvantages

Disadvantages

• There can be potentially hundreds or thousands of activities and individual dependency relationships
• PERT is not easily scalable for smaller projects
• The network charts tend to be large and unwieldy requiring several pages to print and requiring special size paper
• The lack of a timeframe on most PERT/CPM charts makes it harder to show status although colours can help (e.g., specific colour for completed nodes)
• When the PERT/CPM charts become unwieldy, they are no longer used to manage the project.