2013 Volume 69 Issue 2 Pages I_110-I_120
This paper proposes the enhanced resource-dependent critical path method (enhanced RDCPM) for identifying resource dependencies that exist between activities in order to compute the correct floats and determine the critical path in the project schedule under variable resource constraints. In addition to technological relations, there exist resource dependencies between activities in a project schedule under resource constraints that are neglected in traditional resources constrained scheduling (RCS) techniques. Therefore RCS cannot compute the correct floats and critical path(s). Although previous studies have proposed many methods in order to overcome these shortcomings, they assumed that the maximum amount of available resources remains constant during the execution of the project. However, an actual project can have variable resource constraints in certain situations. The enhanced RDCPM, which is an improved version of the RDCPM, reasonably identifies the resource dependencies between activities and computes the correct floats and critical path in a project schedule under either variable or constant resource constraints. Moreover, it provides an updateable schedule with stable work sequences. Therefore, the enhanced RDCPM can be adapted for scheduling and control in real construction projects.