A Capability is a specification of a skill or function that can be performed by a Resource.  For example, a Capability might be “cutting” or “inspection”.  Each Resource has one or more Capabilities that indicate the types of work that it can perform.  In addition, each Job Operation Resource Requirement has one ore more Required Capabilities indicating the Capabilities that a Resource must have to be considered eligible to perform the Operation.  If an Operation, for example, requires a CNC machine and a CNC operator then you would create two Capabilities such as: CNC and CNC-Operator.  Then the Operation would have two Resource Requirements — one specifying CNC and one specifying CNC-Operator.