Supporting Maintenance Scheduling: a case Study
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- GP01 4 Replacing the Stator and Rotor of the Dispensing Pump 09/02/2016 108
| 4. Application case For the application case, it is considered that the technician team is composed by three technicians competent to perform all maintenance tasks to be scheduled and their availability is presented in Table 2. Furthermore, for simplification, it is considered that the maintenance tasks do not require spare parts. The defined scheduling period starts at 10:00 am. of February 9th, 2016 and ends at 17:00 pm. of February 10th, 2016 where only few equipment have availability windows (Table 2). The respective maintenance tasks imported from Maintenance Tasks Table are presented in Table 3. Table 2 - Availability of Technicians and Equipment Availability Technicians Equipment’s Designation Work Schedule Designation BIR Day Hour T 06:00 – 14:30 GP 4 09/02/2016 10/02/016 18:00-24:00 24:00 - 7:00 T 14:30 – 23:00 ASY10_0010 3 10/02/2016 06:00 - 17:00 T 23:00 – 06:00 FCT50_0010 2 09/02/2016 10/02/2016 18:00 - 24:00 24:00 - 04:00 BUR 1 10/02/2016 11:00-24:00 VT 4 09/02/2016 10/02/2016 10:00-20:00 16:00-24:00 The tasks ordering allows to understand the maintenance tasks that should be scheduled first. In cases of tasks with the same BIR and due date, they were ordered by processing time in descending order. This way, the available time of equipment will be filled by the maintenance tasks with higher durations first. 2128 Patrícia Senra et al. / Procedia Manufacturing 11 ( 2017 ) 2123 – 2130 Table 3 - List of maintenance tasks filtered and ordered Equipment Maintenance Tasks index Line Designation BIR Designation Due Date Duration t 2N16 GP01 4 Replacing the Stator and Rotor of the Dispensing Pump 09/02/2016 108 t 2 M VT 4 Cleaning the flow tank 09/02/2016 34 t N GP 4 Curtains replacement of in EPM's 10/02/2016 240 t M VT 4 Check flow quantity 10/02/2016 14 t M VT 4 Machine Check 10/02/2016 11 t N ASY10_0010 3 Replacing Vacuum Pumps (suction cups) 10/02/2016 4 t N FCT50_0010 2 Replace interface needles 09/02/2016 96 t N FCT50_0010 2 Internal cleanliness 09/02/2016 34 t I BUR 1 Maintenance level 1 aparaf. Guides and suction cups (ASI) 09/02/2016 30 t I BUR 1 O-ring replacement 09/02/2016 6 t I BUR 1 Preventive Maintenance PC - Cooler and Mass 10/02/2016 53 t I BUR 1 Cleaning the oven glasses 10/02/2016 32 Analyzing the Table 3, the allocation process will initiate with t task with a duration of 108 min. The equipment associated is GP which has the following available periods 18:00 to 24:00 at February 9th and 24:00 to 07:00 at February 10th during the schedule period, as shown in Fig. 2. The technicians T and Tare available during the first available period of GP, and the technicians T and Tare available during the second period. All technicians are available at different instants. In order to respect the due date and minimize the delays, the maintenance tasks will be allocated at the first available instant that all resources are available. Thus, twill be allocated to technician Tat (Fig. 2). The same process will be executed for the second maintenance task (Fig. 3) and soon until one of the resources finishes In Fig. 4 is presented a Gantt chart for all the equipment that have available periods during the schedule period, with all the tasks allocated. 09/02/2016 10/02/2016 Hours Download 305.56 Kb. Share with your friends:
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