A very simple planning situation exists when the customer’s order equals the factory order, itself divisible into two or more jobs to be done in a specific sequence of operations. Production is then continuous and there are no lead-time problems, although the breakdown of the factory order into two or more operations does affect the capacity of the plant. Our aim is to ensure 100% loading by preserving a perfect balance between available capacity and capacity in demand. We begin by considering alternative process layouts for a factory order split into three different jobs. Jobs done as part of a repeated factory order may be defined as the product of capacity and process time. In the following diagrams, units of capacity are represented by lines: one man = one line, two men = two lines, three men = three lines, and so on. The stipulation that ‘available capacity’ equals ‘capacity in demand’ holds for every example throughout this chapter.
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- ‘Available capacity equals capacity in demand’
J. J. Verzijl
- Macmillan Education UK
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