Before you can add a resource A user that performs a service, or the equipment or facility that is required for a service. to a service A type of work performed for a customer by one or more resources. Services are schedulable activities., you must define a selection rule A set of criteria that specifies which personnel, equipment, facilities, or resource groups are required to perform a service, or how to select these resources, based on parameters such as quantity and capacity. to determine how resources are selected for service activities Schedulable appointments to provide services to customers. A service activity uses one or more resources to perform a service at a specific time and place..
You can create a simple rule that selects resources from a list, or a compound rule that selects a combination of resources. You can also create a complex tree of selection rules that selects from groups of equivalent resources. Compound and complex rules are created by nesting selection rules and subrules.
You can also add resources to existing selection rules.