Using PERT to Plan and Schedule Your Documentation Projects 
Program Evaluation and Review Technique (PERT) is a proven project management tool that can be applied to documentation projects. PERT is used to identify: (a) the interrelationships between the various milestones of a project, and (b) the critical path of activities, the path more resources should be concentrated to complete the project on schedule. A PERT network is a graphical representation of the plan and schedule of the project. The technique is effective in non-repetitive documentation projects where project managers have an accurate assessment of their resources.
Aikat, Shish. STC Proceedings (1996). Articles>Documentation>Project Management