A maintenance department in a company has three types of maintenance jobs that should be performed in one of the company's production areas. These types are the planning maintenance jobs and the emergency/ break down maintenance jobs and the improvement maintenance jobs. The information about these three types is given in Tables 2, 3, and 4. The number of hours that each assigned craftsman can work in each month in any given production area is 55 hours. The productivity of the assigned electrical workers in this area is 90.9% whereas the productivity of the assigned mechanical workers in this area is 80.0%. Construct the next year maintenance master schedule for the maintenance jobs of this department and calculate the total workload for each type of craftsmen in each month. (Hint: the number of working days in one month is 22 days). 1. Planning Maintenance Jobs: Maintenance Number Date of Last Job Workload for Each Craftsmen (Hours/Machine) of Machine Maintenance Working Due Time Hours per for Each Day Machine (Hours/Day) (Hours) Maintenance Month/Day Machines Electrical Mechanical 3 3 3 198 12/05 528 11/11 660 11/10 176 12/08 132 12/10 Table 2 Emergency/ Breakdown Maintenance Jobs: Months Electrical Workload 3 3 3 2 5 2 4 4 3 2 5 2 (Hours) Mechanical Workload 3 4 3 3 5 3 3 4 4 2 5 3 (Hours) Table 3 3. Improvement Maintenance Jobs: Maintenance Hours Needed by Each Craft to Finish the Job Jobs Notes Priority Electrical Mechanical IM1 12 10 The two types of crafts should work together and once the job started, it should not be interrupted. First IM2 The job should be done in two consecutive months. Third IM3 10 The two types of crafts should work together. The job should be done in one month. Second Table 4 A maintenance department in a company has three types of maintenance jobs that should be performed in one of the company's production areas. These types are the planning maintenance jobs and the emergency/ break down maintenance jobs and the improvement maintenance jobs. The information about these three types is given in Tables 2, 3, and 4. The number of hours that each assigned craftsman can work in each month in any given production area is 55 hours. The productivity of the assigned electrical workers in this area is 90.9% whereas the productivity of the assigned mechanical workers in this area is 80.0%. Construct the next year maintenance master schedule for the maintenance jobs of this department and calculate the total workload for each type of craftsmen in each month. (Hint: the number of working days in one month is 22 days). 1. Planning Maintenance Jobs: Maintenance Number Date of Last Job Workload for Each Craftsmen (Hours/Machine) of Machine Maintenance Working Due Time Hours per for Each Day Machine (Hours/Day) (Hours) Maintenance Month/Day Machines Electrical Mechanical 3 3 3 198 12/05 528 11/11 660 11/10 176 12/08 132 12/10 Table 2 Emergency/ Breakdown Maintenance Jobs: Months Electrical Workload 3 3 3 2 5 2 4 4 3 2 5 2 (Hours) Mechanical Workload 3 4 3 3 5 3 3 4 4 2 5 3 (Hours) Table 3 3. Improvement Maintenance Jobs: Maintenance Hours Needed by Each Craft to Finish the Job Jobs Notes Priority Electrical Mechanical IM1 12 10 The two types of crafts should work together and once the job started, it should not be interrupted. First IM2 The job should be done in two consecutive months. Third IM3 10 The two types of crafts should work together. The job should be done in one month. Second Table 4
