Secondary Resource Constraints  go beyond the basic constraints of calendars, machines and work centers.  Many manufacturers need their production scheduling to consider the availability of both a required machine and secondary resources such as labor and tooling.  In addition, other manufacturers need to define a constraint which limits certain jobs to be performed only on a certain subset of the work stations (machines) inside a given work center.  Sometimes, tooling requirements can also limit an operation to only be performed on a certain subset of the available tools, whereas other parts can be made with any of the tools in that tool-type. Accurate modeling of shop constraints creates an accurate picture of true shop capacity, and this is the key to effective production scheduling across varied styles of manufacturing.   JobTime^®5 recognizes multiple types of secondary resources.  These secondary constraints can include labor, equipment, floor space, and consumables.  Labor can also be designated by shift, or by qualified skills for a given resource group. Just as an operation can request a ‘subset’ of qualified labor resources, it can also request a ‘subset’ of qualified tool resources. JobTime^®5 also lets you define resource constraints on floor space, power consumption and consumable materials.