Activity Network Diagrams
An Activity Network Diagram deals primarily with time. This tool will help you plan how long a project will take, which jobs you can afford to delay a bit, and which jobs abso"lutely must be completed in a minimum amount of time.
The Activity Network analysis is often (nowadays) provided by use of a gannt chart.
An excellent source of additional information on this Management & Planning Tool is The Memory Jogger Plus +, by Michael Brassard (Goal/QPC, 1989).