A manufacturing system has gained a new long-term contract to manufacture several components which may form...
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A manufacturing system has gained a new long-term contract to manufacture several components which may form two different part families. The contract term is 10 years, and this has taken as an opportunity to expand the existing facility and allocate the new equipment for processing the part families to meet the monthly demand on time to avoid possible contract- based penalty charges. The company, as an initial stage, wishes to get a rough-cut purchase plan to decide how many machines and other type of equipment are needed to meet the demand on time. The part types, their monthly demands as well as the process plans are given below. Part Type P1 P2 P3 P4 P5 P6 P6 P7 P8 P9 P10 Process Plan M2, M3, D, GP, Ins M1, M2, GP, Ins M1, M3, GP, Ins M2, M1, MT, D, Ins M1, M3, MT, D, Ins T1, T2, GT, H, CM, Ins T2, T3, GT, H, CM, Ins T1, T2, GT, CM, Ins T1, T3, CM, Ins T1, T2, GT, H, CM, Ins T2, T3, H, GT,CM, Ins M1 Milling Machine Type 1 M2 Milling Machine Type 2 M3 Milling Machine Type 3 T1 Turning Machine Type 1 Demand ×1000/month 1.5 1.5 2 1 1 2 1 2 1.5 2 1.5 T2 Turning Machine Type 2 T3 Turning Machine Type 3 MT Mill-Turn Machine D Drilling Machine GP Grinding Machine for Prismatic Parts GR Grinding Machine for Rotational Parts CM Coordinate Measuring Machine H Heating System Ins Inspection System The machines are going to be placed in the shop floor following the group technology principles and it is thought that there should be on average 5-meter distance between any two machines because of security and any other reasons. Since the system is supposed to be an automated system, to catch the pace of the system as well as creating a high flexibility, the material handling system is thought to be an automated guided vehicle system (AGVs) with enough number of AGV cars. The average travelling time including loading, onloading, positioning, waiting, losses in traffic, etc., between raw material store and Load/Unload (L/U) station and L/U station and the cells is 5 minutes one way. Finished parts are taken back to L/U station to clear the machines and the shop floor. Sometimes parts might be inspected more than once until the operator makes sure that the parts satisfy the required standards and the average number of inspections at the inspection station is 4. Inspection machine and heating system can be used for both part geometries; therefore, they are not specified based on the technology. The system is supposed to work with a high efficiency, and it is assumed that the utilization of the system is 97% after losses considered because of unscheduled breakdowns, cutting tool exchanges, material shortages, handling system delays etc. The processing times at the related workstations for each part type are given in the following table. Assume that the factory works 50 weeks in a year and the number of shifts the system works per week is 18. Each shift is 8 hours. Considering the data provided for the system, advice the factory how many machines and equipment they would purchase for each type to meet the demand timely. Part Type P1 P2 P3 P4 P5 P6 P6 P7 P8 P9 P10 Process times (Numbers in parentheses are in minutes) Demand(units/m) M2 (7.5), M3(4), D(2), GP(10), Ins(1.5) M1(6), M2(8.5), GP(12), Ins(2) M1(3), M3(6), GP(7), Ins(1) M2(5), M1(6), MT(13), D(4), Ins(2.5) M1(12), M3(8), MT(15), D(3), Ins(3) T1(4.5), T2(8.5), GT(10), H(5), CM(2), Ins(2) T2(6), T3(3), GT(7), H(4), CM(3), Ins(1.5) T1(7), T2(8), GT(12), CM(3), Ins(2) T1(5), T3(9), CM(2), Ins(2) T1(6), T2(11), GT(9), H(5), CM(3), Ins(2) T2(3), T3(10), H(5), GT(6), CM(4), Ins(3) 1500 1500 2000 1000 1000 2000 1000 2000 1500 2000 1500 A manufacturing system has gained a new long-term contract to manufacture several components which may form two different part families. The contract term is 10 years, and this has taken as an opportunity to expand the existing facility and allocate the new equipment for processing the part families to meet the monthly demand on time to avoid possible contract- based penalty charges. The company, as an initial stage, wishes to get a rough-cut purchase plan to decide how many machines and other type of equipment are needed to meet the demand on time. The part types, their monthly demands as well as the process plans are given below. Part Type P1 P2 P3 P4 P5 P6 P6 P7 P8 P9 P10 Process Plan M2, M3, D, GP, Ins M1, M2, GP, Ins M1, M3, GP, Ins M2, M1, MT, D, Ins M1, M3, MT, D, Ins T1, T2, GT, H, CM, Ins T2, T3, GT, H, CM, Ins T1, T2, GT, CM, Ins T1, T3, CM, Ins T1, T2, GT, H, CM, Ins T2, T3, H, GT,CM, Ins M1 Milling Machine Type 1 M2 Milling Machine Type 2 M3 Milling Machine Type 3 T1 Turning Machine Type 1 Demand ×1000/month 1.5 1.5 2 1 1 2 1 2 1.5 2 1.5 T2 Turning Machine Type 2 T3 Turning Machine Type 3 MT Mill-Turn Machine D Drilling Machine GP Grinding Machine for Prismatic Parts GR Grinding Machine for Rotational Parts CM Coordinate Measuring Machine H Heating System Ins Inspection System The machines are going to be placed in the shop floor following the group technology principles and it is thought that there should be on average 5-meter distance between any two machines because of security and any other reasons. Since the system is supposed to be an automated system, to catch the pace of the system as well as creating a high flexibility, the material handling system is thought to be an automated guided vehicle system (AGVs) with enough number of AGV cars. The average travelling time including loading, onloading, positioning, waiting, losses in traffic, etc., between raw material store and Load/Unload (L/U) station and L/U station and the cells is 5 minutes one way. Finished parts are taken back to L/U station to clear the machines and the shop floor. Sometimes parts might be inspected more than once until the operator makes sure that the parts satisfy the required standards and the average number of inspections at the inspection station is 4. Inspection machine and heating system can be used for both part geometries; therefore, they are not specified based on the technology. The system is supposed to work with a high efficiency, and it is assumed that the utilization of the system is 97% after losses considered because of unscheduled breakdowns, cutting tool exchanges, material shortages, handling system delays etc. The processing times at the related workstations for each part type are given in the following table. Assume that the factory works 50 weeks in a year and the number of shifts the system works per week is 18. Each shift is 8 hours. Considering the data provided for the system, advice the factory how many machines and equipment they would purchase for each type to meet the demand timely. Part Type P1 P2 P3 P4 P5 P6 P6 P7 P8 P9 P10 Process times (Numbers in parentheses are in minutes) Demand(units/m) M2 (7.5), M3(4), D(2), GP(10), Ins(1.5) M1(6), M2(8.5), GP(12), Ins(2) M1(3), M3(6), GP(7), Ins(1) M2(5), M1(6), MT(13), D(4), Ins(2.5) M1(12), M3(8), MT(15), D(3), Ins(3) T1(4.5), T2(8.5), GT(10), H(5), CM(2), Ins(2) T2(6), T3(3), GT(7), H(4), CM(3), Ins(1.5) T1(7), T2(8), GT(12), CM(3), Ins(2) T1(5), T3(9), CM(2), Ins(2) T1(6), T2(11), GT(9), H(5), CM(3), Ins(2) T2(3), T3(10), H(5), GT(6), CM(4), Ins(3) 1500 1500 2000 1000 1000 2000 1000 2000 1500 2000 1500
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Answers and Explanations M 1 M illing Machine Type 1 3 This is based on the demand of 1500 units per month and the processing time of 6 minutes per unit With 18 shifts of 8 hours per week there are 14... View the full answer
Related Book For
Intermediate Accounting
ISBN: 978-0324659139
11th edition
Authors: Loren A. Nikolai, John D. Bazley, Jefferson P. Jones
Posted Date:
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