In general, depletable resources, and those limited by periodic availability, should be considered individually during the planning process. This means that project schedules should be designed to ensure efficient use of non-constraint resources, and that tight controls should be placed on the consumption of constrained resources. In addition to availability consideration, the cost of resources should be weighted when developing project schedules. Very important whenever activities can be performed by different sources. Cost-time relationship is linear.
Normal time assumes low cost, efficient methods to complete the activity.
Crash time represents a limit to reduction under realistic conditions. Slope represents cost per unit of time. All accelerations must occur within the normal and crash times. Given the following, find the crash cost per day, which activities should be crashed to meet a project deadline of 10 days with a minimum cost, and the new cost.