When trying to identify the project resource constraints it is wise to categorise the constraints into classes. Appraise the THREE (3) categories of resource constraints that you have studied. The constraints can be further discussed and categorized into the following classes 1. Technical or Logical Constraints. These constraints address the sequence in which the project activities must occur. The project network depicts the technical constraints. 2. Physical Constraints. These constraints cause activities that would normally occur in parallel to be constrained by contractual or environmental conditions. 3. Resource Constraints These constraints address the sequence in which the project activities must occur. The project planner may assume adequate resources and show activities occurring in parallel