Abstract
In the PERT/CPM scheduling techniques (see articles 5.1.6 on page 59 and 5.1.2 on page 46), project activities are characterized by their estimated duration(s) and project networks are constructed by adding precedence relations between these activities. It is therefore implicitly assumed that these activities do not require resources during their execution (or alternatively, the assumption is that the resources are unlimited in availability). In practice, activities need resources during their execution that are often limited in availability. These resources have been classified in two basic categories, as follows:
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