Concept explainers
a
Interpretation: Maximum rate at which the restaurant can successfully serve arriving cars with product layout.
Concept Introduction: Product layout is the sequence of machines and work stations which are kept a long line of production. Process layout is the sequence of a work station which are aligned to improve the efficiency of work.
b
Interpretation: Efficiency applied by design.
Concept Introduction: Effective capacity is the representation of how effectively the designed capacity of the work station is utilized during the normal working condition.
c
Interpretation: Maximum rate at which the restaurant can successfully serve arriving cars.
Concept Introduction: The efficiency of output is the actual productivity generated compared with the planned or effective capacity. It is usually calculated by dividing actual output by effective capacity.
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Practical Operations Management
- The Morris Machine Company just received an order to refurbish five motors for materials handling equipment that were damaged in a fire. The motors have been delivered and are available for processing. The motors will be repaired at two workstations in the following manner. Workstation 1: Dismantle the motor and clean the parts. Workstation 2: Replace the parts as necessary, test the motor, and make adjustments. The customer’s shop will be inoperable until all the motors have been repaired, so the plant manager is interested in developing a schedule that minimizes the makespan and has authorized around-the-clock operations until the motors have been repaired. The estimated time to repair each motor is shown in the following table: TIME (HR) Motor Workstation 1 Workstation 2 M1 M2 M3 M4 M5 12 4 5 15 10 22 5 3 16 8arrow_forwardThe operation Management Computer Lab at the PUPR has two student software statistical package assignment assistant. The students form a single line to wait for help from the computer laboratory assistant. The students are helped first come, first served. On the average students arrive for help, following a triangular distribution (x1 5, y1 0).(x2 15, y2 ?) minutes. Each computer laboratory assistant, on the average can help 1 student per 15 minute (add all the numbers in your student ID) minutes and the service rate follow an exponential distribution. Determine Y2 or h. O a. H = 0.33 POb.H=2 OC.H=0.25 O d. H-0.2arrow_forwardThe Pullman Mig, Inc. three-station work cell illustrated in the figure below has two machines at station 1 in parallel. (The product needs to go through only one of the two machines before proceeding to station 2.) 20 minunit Station 1 Machine A Station 1 Machine B 20 min/unit Station 2 6 min/unit Station 3 12 minunit The manager, Seimone Hartley, has asked you to evaluate the system if she adds a parallel machine at station 3. a) The throughput time of the new work cell is 38 minutes (enter your response as a whole number). b) The bottleneck time of the new work cell is 10 minutes per unit (enter your response as a whole number). c) If the firm operates 10 hours per day, 6 days per week, the weekly capacity of the work cell with the second machine at workstation 3 is 360 units (enter your response as a whole number). d) If the firm operates 10 hours per day, 6 days per week, the weekly capacity of the work cell without the second machine at workstation 3 is units (enter your response…arrow_forward
- The following diagram describes a service system where customers go through either of the two parallel three-step processes (A1-A2-A3 or B1-B2-B3) and then merge into a single line for the final step (F4). Each step has one worker assigned to it (total of 7 workers). The numbers in parentheses are the times in minutes for each step of the process. ( see attached image) What is the capacity of the entire system in terms of customers per hour? Hint: Start with calculating hourly capacity of A1-A2-A3 and B1-B2-B3. How much will the system capacity change if a second worker is assigned to step F4?arrow_forwardRead the case study carefully and answer the questions at the end. Mr. Ahmed, manager of the Bara Gali Hotel, is considering how to restructure the front desk to reach an optimum level of staff efficiency and guest service. At present, the hotel has five clerks on duty, each with a separate waiting line, during peak check-in time of 3:00 p.m. to 5:00 p.m. Observation of arrivals during this period shows that an average of 90 guests arrive each hour (although there is no upward limit on the number that could arrive at any given time). It takes an average of 3 minutes for the front-desk clerk to register each guest. Mr. Ahmed is considering three plans for improving guest service by reducing the length of time that guests spend waiting in line. • The first proposal would designate one employee as a quick-service clerk for guests registering under corporate accounts, a market segment that fills about 30% of all occupied rooms. Because corporate guests are preregistered, their registration…arrow_forwardRead the case study carefully and answer the questions at the end. Mr. Ahmed, manager of the Bara Gali Hotel, is considering how to restructure the front desk to reach an optimum level of staff efficiency and guest service. At present, the hotel has five clerks on duty, each with a separate waiting line, during peak check-in time of 3:00 p.m. to 5:00 p.m. Observation of arrivals during this period shows that an average of 90 guests arrive each hour (although there is no upward limit on the number that could arrive at any given time). It takes an average of 3 minutes for the front-desk clerk to register each guest. Mr. Ahmed is considering three plans for improving guest service by reducing the length of time that guests spend waiting in line. • The first proposal would designate one employee as a quick-service clerk for guests registering under corporate accounts, a market segment that fills about 30% of all occupied rooms. Because corporate guests are preregistered, their registration…arrow_forward
- The Pullman Mfg., Inc. three-station work cell illustrated in the figure below has two machines at station 1 in parallel. (The product needs to go through only one of the two machines before proceeding to station 2.) 12 min/unit Station 1 Machine A Station 1 Machine B 12 min/unit Station 2 12 min/unit Station 3 2 min/unit The manager, Ms. Hartley, has asked you to evaluate the system if she adds a parallel machine at station 2. a) The throughput time of the new work cell is minutes (enter your response as a whole number). Qarrow_forwardThe Pullman Mfg., Inc. three-station work cell illustrated in the figure below has two machines at station 1 in parallel. (The product needs to go through only one of the two machines before proceeding to station 2.) 12 min/unit Station 1 Machine A Station 1 Machine B 12 min/unit Station 2 12 min/unit Station 3 2 min/unit The manager, Ms. Hartley, has asked you to evaluate the system if she adds a parallel machine at station 2. a) The throughput time of the new work cell is 26 minutes (enter your response as a whole number). b) The bottleneck time of the new work cell is minutes per unit (enter your response as a whole number). Q Marrow_forwardThe Pullman Mfg., Inc. three-station work cell illustrated in the figure below has two machines at station 1 in parallel. (The product needs to go through only one of the two machines before proceeding to station 2.) 12 min/unit Station 1 Machine A Station 1 Machine B 12 min/unit Station 2 12 min/unit Station 3 2 min/unit The manager, Ms. Hartley, has asked you to evaluate the system if she adds a parallel machine at station 2. a) The throughput time of the new work cell is 26 minutes (enter your response as a whole number). b) The bottleneck time of the new work cell is 6 minutes per unit (enter your response as a whole number). c) If the firm operates 10 hours per day, 6 days per week, the weekly capacity of the work cell with the second machine at workstation 2 is whole number). units (enter your response as aarrow_forward
- Super Fun Industries manufactures four top-selling toys code named A-148, B-356, B-457, and C-843. The following table shows how long it takes to process each toy through each required station. Note that all times are in minutes. Super Fun’s manufacturing plant is open 16 hours a day, 5 days a week, and 8 hours on Saturday. A-148 B-356 B-457 C-843 Processing Time Station 1 6 min 5 min 0 min 8 min Processing Time Station 2 4 min 4 min 5 min 2 min Processing Time Station 3 5 min 7 min 4 min 2 min Processing Time Station 4 3 min 0 min 10 min 1 min a. If only toy A-148 is produced during a specific week, how many units could be produced? b. If weekly demand for the four products are A-148 = 200 units, B-356 = 250 units, B-457 = 250 units, and C-843 = 300 units, which station is the bottleneck, and is it capable of producing all the toys demanded?arrow_forwardThe Pullman Mfg., Inc. three-station work cell illustrated in the figure below has two machines at station 1 in parallel. (The product needs to go through only one of the two machines before proceeding to station 2.) 20 min/unit Station 1 Machine A b) The bottleneck time of the new work cell is Station 1 Machine B 20 min/unit Station 2 2 min/unit Station 3 12 min/unit + The manager, Seimone Hartley, has asked you to evaluate the system if she adds a parallel machine at station 3. a) The throughput time of the new work cell is minutes (enter your response as a whole number). minutes per unit (enter your response as a whole number). c) If the firm operates 9 hours per day, 6 days per week, the weekly capacity of the work cell with the second machine at workstation 3 is units (enter your response as a whole number). d) If the firm operates 9 hours per day, 6 days per week, the weekly capacity of the work cell without the second machine at workstation 3 is units (enter your response as a…arrow_forwardSuper Fun Industries manufactures four top-selling toys code-named A-148, B-356, B-457, and C-843. The following table shows how long it takes to process each toy through each required station. Note that all times are in minutes. Super Fun's manufacturing plant is open 12 hours a day, 5 days a week, and 8 hours on Saturday. b. If weekly demand for the four products are A-148=180 units, B-356=310 units, B-457=280 units, and C-843=300 units, which station is the bottleneck, and is it capable of producing all the toys demanded? The bottleneck for Super Fun Industries is ▼ Station 1 Station 2 Station 3 Station 4 , with a utilization of ______%. (Enter your response rounded to one decimal place.)arrow_forward
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