Mẹo về For a single processing station with a positive setup time, which of the following is true? 2022

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Set-up times often have a significant effect on the performance of a process and can even determine a process bottleneck. The most important definition here is that of the batch: A batch is the number of flow units, which are produced between two set-ups. To calculate the capacity of a process with respect to the batch size, the
following formula is needed:

capacity = (batch size) / (set-up time + batch size * time per unit)

Note, that this is the capacity of the process for producing a batch. For example, if the batch size happens to be 10 flow unites per minute, this calculation answers the question of how long it will take to produce one complete batch. This is a deviation from the previous definition of capacity, which did not take
the batch size into account and was simply calculated as:

capacity = number of resources / processing time

The capacity can by this basic definition be calculated for every station in a process. It is always m / processing time with m being the number of resources (e.g. workers) being devoted to this process step. If, for example, one worker needs 40 seconds to put together a sandwich, the capacity of this station is 1/40 per second or 1,5 sandwiches per minute. If there are
two workers on the same station, the capacity increases to 2/40 per second or 3 sandwiches per minute.

Usually, the larger the batch, the more efficient the production process becomes (economics of scale). Companies with custom-made batches are therefore trying to get their customers to order large batches (sometimes even forcing them). The bigger a batch grows, the more irrelevant the set-up time becomes with the process capacity getting closer and closer to the original
definition of m / processing time. This is because the processing time is less and less determined by the set-up time with larger batch sizes. Thus, set-ups reduce capacity – and therefore, companies have an incentive to aim for such large batches. However, large batches also increase inventory – with all of the negative consequences (e.g. storage costs, ageing of shelved products etc.).

These lecture notes were taken
during 2013 installment of the MOOC “An Introduction to Operations Management” taught by Prof. Dr. Christian Terwiesch of the Wharton Business School of the University of Pennsylvania Coursera.org.

  • School
    University of California, Davis
  • Course Title
    200B 2006
  • Pages 1
  • Ratings 100% (4) 4 out of 4 people found this document helpful

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Quiz 11.Excellence in operations management ensures a firm’s profitability. True () False
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3.In which type of processing system does a hospital emergency department (ER) operate?

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4.For a single processing station with positive setup time, which of the following is true?

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Following, The Higher, Mass production, Emergency Department, Bottleneck

What is set up time in operations management?

Setup time is the interval needed to adjust the settings on a machine, so that it is ready to process a job. Shortening the amount of setup time is critical for engaging in short production runs, so that a business can more easily engage in just-in-time production.

Does process time include setup time?

It refers to the time from the start of the work through the end of it in a process, and it usually consists of waiting time, setup time, real operating time, and post-processing time. waiting time: It means the status of waiting for the time when the work is allocated to each machine.
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