Machine Repair Planning is concerned with allocating employees to repair orders. In this section, we will cover the basic language of the problem; the constraints and objectives, and then the dataset that we will use.
2.1 Repair Orders and Employees
For each repair order we have:
1. Urgency: normal order or urgent order
2. Total employee: the number of employee(s) need to work on it
3. Group: the group of technician(s) that need to work on it
One can consider other aspect. For example, the machine needs to be repair or maintain in certain time limit or sort the orders by urgent to normal. However in this paper, we are not considering all these as we just use two types of urgency that is normal order and urgent order. For repair order that needs multiple technicians, the order will be divided into multiple parts based on the number of employee it needs. For example, repair order named 10004 needs 3 employees so it is divided into 3 parts that is 10004(A), 10004(B) and 10004(C). In this paper, we define two groups, electrical and mechanical. In this case, a repair order may needs employee from electrical group, mechanical group or either group.
In general, employees are divided into groups. In general, employee can be divided into several groups. However we divide employees into only two groups as mentioned earlier. However, we do not consider employee’s working shift.
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