OPERATIONS MANAGEMENT
2nd Edition
ISBN: 9781260238877
Author: CACHON
Publisher: RENT MCG
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Question
Chapter 5, Problem 16PA
a)
Summary Introduction
To identify: The bottleneck step in the process.
b)
Summary Introduction
To determine: The capacity of the process.
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Consider the following three-step assembly operation with quality problems. All resources are staffed by one employee.
The first resource has a processing time of 7 minutes per unit.
The second resource has a processing time of 6 minutes per unit.
The third resource has a processing time of 5 minutes per unit. With a 40% probability, the flow unit coming out of the third resource has to be reworked. In that case, the operations at the second and third resources are repeated. You can assume that (a) rework always succeeds (i.e. a unit going through the rework loop will always work after the third resource),and (b) the processing times for units in rework are the same as for regular units.
Where in the process is the bottleneck?
1 point
Step 3
Step 2
Step 1
5.Question 5
A machine makes two components; call them types A and B. It takes 250 seconds to switch production between the component types. During that time, no production occurs. When in production, each unit of A or B requires 0.5 second to be completed. The two components, A and B, are combined in an assembly process to make a final product; call it C. The assembly step can combine the two components into 1 unit every 2 seconds, or 30 units per minute. Assume there is ample demand.
Suppose the machine rotates between one batch of 1,000 unties of A and 1,000 units of B. What is the utilization of the machine?
answer: _____percent
A machine makes two components; call them types A and B. It takes 250 seconds to switch production between the component types. During that time, no production occurs. When in production, each unit of A or B requires 0.5 second to be completed. The two components, A and B, are combined in an assembly process to make a final product; call it C. The assembly step can combine the two components into 1 unit every 2 seconds, or 30 units per minute. Assume there is ample demand.
If the production schedule could be adjusted with the goal of minimizing inventory in the process, how many units of A should be produced before switching to component B? In other words, calculate the optimal batch size for component A. Assume the same number of units of B would be produced as well.
answer:_______units
Chapter 5 Solutions
OPERATIONS MANAGEMENT
Ch. 5 - Prob. 1CQCh. 5 - Prob. 2CQCh. 5 - Prob. 3CQCh. 5 - Prob. 4CQCh. 5 - Prob. 5CQCh. 5 - Prob. 6CQCh. 5 - Prob. 7CQCh. 5 - Prob. 8CQCh. 5 - Prob. 9CQCh. 5 - Prob. 10CQ
Ch. 5 - Prob. 11CQCh. 5 - Prob. 12CQCh. 5 - Prob. 13CQCh. 5 - Prob. 14CQCh. 5 - Prob. 15CQCh. 5 - Prob. 16CQCh. 5 - Prob. 1PACh. 5 - Prob. 2PACh. 5 - Prob. 3PACh. 5 - Prob. 4PACh. 5 - Prob. 5PACh. 5 - Prob. 6PACh. 5 - Prob. 7PACh. 5 - Prob. 8PACh. 5 - Prob. 9PACh. 5 - The help desk at Triple Stacked handles calls from...Ch. 5 - Prob. 11PACh. 5 - A pharmaceutical company creates a compound with a...Ch. 5 - Prob. 13PACh. 5 - Prob. 14PACh. 5 - Prob. 15PACh. 5 - Prob. 16PA
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- A machine makes two components; call them types A and B. It takes 250 seconds to switch production between the component types. During that time, no production occurs. When in production, each unit of A or B requires 0.5 second to be completed. The two components, A and B, are combined in an assembly process to make a final product; call it C. The assembly step can combine the two components into 1 unit every 2 seconds, or 30 units per minute. Assume there is ample demand. Suppose the machine rotates between one batch of 1,000 untis of A and 1,000 units of B. In that case, what is the capacity of the machine in component pairs per minute, where a component pair is one unit of A and one unit of B? answer: __________ component pair per minutearrow_forwardThe processing time for the robogate has a normal distribution with mean 25 Sec and standard deviation 3 sec Find the probability that the next operation of the robogate will take 28.5 sec or less.( Round to three decimals)arrow_forwardA stepper is a piece of equipment in semiconductor manufacturing. Each wafer's initial pass through the stepper requires 15 minutes. For 40 percent of wafers, they make only a single pass through the stepper. But 60 percent of wafers need to make a second pass through the stepper. The processing time on the second pass is 40 minutes. Instruction: Round your answer to 2 decimal places. How many wafers does the stepper complete per hour (wafers/hr)? per hourarrow_forward
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- Answer is complete but not entirely correct. A campus deli serves 300 customers over its busy lunch period from 11:30 am to 1:30 pm. A quick count of the number of customers waiting in line and being served by the sandwich makers shows that an average of 7 customers are in process at any point in time. What is the average amount of time that a customer spends in process? Instruction: Round your intermediate and final answer to 1 decimal place. Average amount of time (Round to one decimal) 4.9 8 minutesarrow_forward. A resource has an implied utilization of 150 percent. This is the highest implied utilization in the process. This means that the resource is the bottleneck. True or false?a. Trueb. Falsearrow_forwardThe slowest point in a process is a ________. Group of answer choices Bottleneck Lost production Surplus Throughputarrow_forward
- An average of 1200 parts arrive to the EP chamber during an 8-hour workday. Each part goes through two stages of processing. At each stage, a single product is processed at a time, and processing takes an average of 15 seconds at the first station and 12 seconds at the second station. Inter-arrival times and service times are exponentially distributed. At the end of the second step, the product goes through a quality check. 5% of the parts fail the quality check and are sent back to the second stage of service. Parts exit the system only after they pass the quality check. Ignoring the time required to perform the quality check or in moving the part through the facility, what is the average cycle time for parts?arrow_forwardThese four phases make up a machine cycle, which is also known as a process loop. What percentage of a machine's cycle time do you value the most? Should I be concerned about replacing parts of the machine cycle when they wear out? Is the problem of switching modules improved by adding a second module?arrow_forwardCustomers are served in a process with two resources. The processing time of the first resource is 15 hours. The processing time of the second resource is 9 hours. The first resource has 15 workers and the second resource has 6 workers. The cycle time of the process is 16 hours. Instruction: Round your answer to one decimal place. What is the average labor utilization (%)? percentarrow_forward
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