Construction contracts often require large sections of work to be accomplished in a specific sequence. For example one wing of the project is to be completed before the other to allow the owner to take occupancy of that wing. In another example, completing the retail space in a multi-use high-rise building is of critical concern to the developer.

Phasing is included in projects in two ways. First those tasks related to each phase may be grouped. Next, specific dates can be included in the schedule as “milestone” dates. After we look at the mechanics of precedence diagramming, then we will return to this topic.