People s choice of whether or not to work on an activity can be influenced by their knowledge of the likelihood of that activity to change or be reworked later. Prior to running the simulation, a rework risk is estimated for each activity based on the likelihood and the impact of changes in the activity s inputs. First-order rework is caused by changes in inputs from downstream activities and is the sum of the product of rework probability and rework impact for all such inputs. Second-order rework is the sum of the product of rework probability and rework impact for all such inputs, where each such product is further multiplied by the upstream activity s estimated rework risk. Number of dependent activities .
People are more likely to work on activities upon which a large number of other people depend.
The number of marks in each column of the binary DSM is counted to determine the number of dependent activities. Nearness to completion . This attribute is a function of the amount of work remaining for the activity. It assumes that people would rather finish nearly complete activities than begin new activities. Relative duration .