Scheduling is the process of defining the start and end times of each job over the selected period of time. There is also the term Sequencing, which means defining the order in which all the jobs will be produced. These terms are often used as interchangeable. Indeed, defining start times for each job automatically defines the order, in which they are made. And if all the jobs are put into the sequence, it is enough to define the start time of the sequence and all the following orders will have defined start and end times.
Scheduling in Phenix requires the following:
Product master data for Sites, Lines, Materials, Production Rates, Changeovers, and Units of measure.
A Product Wheel for each line with its Cycles, and Spokes.
Orders to produce with the quantity, duration, and due date.
Orders can be created by importing an external file of orders from another system, for example, an ERP planning system.
Orders can be as well created internally in Phenix using the Plan to Make feature that will create orders to maintain inventory above targets. This requires importing requirements (demand) data from the external system.
Orders can be in any status, for example, planned, production, process, committed, firm, ...
Once the master data, wheel data, and orders are created, Phenix schedules the orders on each line in the Product Wheel sequence. Phenix chooses the latest wheel cycle for each order that will meet the customer's due date.
If the due date cannot be met, Phenix will provide warning messages.
The Phenix scheduling horizon consists of three zones:
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A committed zone where orders are not automatically rescheduled.
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A planning zone where orders can be automatically Product Wheel scheduled.
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Below is a description of the various work instructions and work instruction categories for Phenix scheduling.
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