Secondary Resource Constraints


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.   JobTime5 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. JobTime5 also lets you define resource constraints on floor space, power consumption and consumable materials.


bullet JobTime5 recognizes ‘Secondary Resource Constraint’s which include additional modeling requirements:
bulletModeling overlapping tasks to maximize 'Just-in-Time', Parallel, From-Start, and activity branches inside each work order;
bulletAllowing a single operator to simultaneously tend two or more machines;
bulletLabor skill rankings in multiple skill categories, assignment of labor to tasks by skill ranking;
bulletSchedule Board shows both machines and assigned labor, tooling and any other resources per task;
bulletVisibly splitting operations across multiple work stations to saturate available capacity;
bulletAccurately modeling the competition of individual pieces of multiple orders in shared production;
bulletSequencing orders to group exact setup matches to reduce setup changeovers for optimal efficiency;
bulletSequencing orders based on a From-To Setup Matrix reflecting all feasible changeovers;
bulletSequencing that allows custom logic to enforce side-constraints like trait grouping, horizon limit and over-rides;
bulletEarliest time-of-day to let an operation ever be started, reflecting environmental conditions of heat, humidity;
bulletLatest time-of day to let an operation to prevent overnight operations where unattended operation is infeasible;
bulletSeizing a resource and holding it in place across a series of operations such as a person, tool, tote, or machine
bulletPreventing WIP obsolescence between operations by locking downstream capacity before starting an upstream task



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