Chapter 14, Order Release and Control Video Solutions, Integral Logistics Management: Operations and Supply Chain Management Within and Across Companies,

Problem 1

Load-Oriented Order Release (Loor)

The first table in Figure 14.7.1.1 shows five orders with their sequence of operations. The data for each operation include the work center, the standard load (e.g., setup plus run time), and a blank column for entering the converted load.
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The second table in Figure 14.7.1.1 shows parameters for load-oriented order release, as introduced in Section 14.1.2, as well as their values given for this exercise. The third table holds data for each work center, namely, the weekly capacity, the existing (pre-)load before loading the five orders, a blank column for entering the capacity upgraded by the loading percentage, and blank columns for the summarized load after releasing orders 1 to 5 (that is in the sequence given by the Loor algorithm).
a. Load the five orders according to the Loor algorithm.
b. What would have happened if for operation 3 of order 2 the standard load had been 200 units of time instead of 120 ?
c. Discuss whether in your solution the treatment of order 3 was efficient.
d. What would have happened if order 3 had been loaded before order 2 ?

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Problem 2

Capacity-Oriented Materials Management (Corma)

Applying the capacity-oriented materials management (Corma) principle has which of the following results?

I Evenly distributed extension of the manufacturing lead time for all the orders

II Minimum amount of work in process
III Maximum utilization of the generally well-utilized work centers
a. II only
b. III only
c. I and II only
d. II and III only

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Problem 3

Finite Forward Scheduling

Your company owns one lathe (M1), one milling machine (M2), and one drilling machine (M3). A working day lasts eight hours. As Figure 14.7.3.1 shows, eight products (P1, P2, P3, ..., P8) are manufactured on these machines. Each product loads these machines in a different sequence. For simplicity, assume that there is no interoperation time.
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Perform finite forward scheduling for the next three days. The normal working time of 8 hours per day has to be respected, as do the sequence of the operations for each order given by Figure 14.7.3.1 and the following three priority rules:
1. No idle time on the machine
2. Operation with the shortest processing time
3. Longest remaining lead time for the order

The Gantt-type chart planning board in Figure 14.7.3.2 will help you to perform the task. Note the first orders on each machine. The order for product $\mathrm{P} 1$ has been chosen for machine Ml because of the third priority rule.
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Discuss whether other priority rules would result in a better solution with regard to work in process.

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