OPS 574 Wk 5 – Practice: Formative Assessment

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OPS 574 Wk 5 - Practice: Formative Assessment
OPS 574 Wk 5 – Practice: Formative Assessment
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OPS 574 Wk 5 – Practice: Formative Assessment

Which of the following is a benefit of overbooking a resource?

 

multiple choice

  • It helps to reduce the average number of jobs waiting to be processed on the resource.
  • It helps to reduce the average flow time of jobs through a resource.
  • It helps to increase the utilization of the resource.
  • It helps to reduce the processing times of jobs at a resource.

 

 

Jobs have different processing times and due dates. If a job is finished earlier than its due date but one day sooner than expected, how does this change the job’s lateness?

 

multiple choice

  • Lateness decreases by one day.
  • Lateness does not change.
  • Lateness increases by one day.
  • It is not possible to determine the impact on lateness of the job with the given information.

 

 

A sales organization creates a new sales forecast by simply taking the average of demand forecasts that each sales manager generated individually. What type of subjective forecasting approach best describes this?

 

multiple choice

  • Forecast combination
  • Forecast with consensus building
  • Prediction market

Time-series forecasting

 

 

With weighted shortest processing time, jobs are scheduled at a resource in what order?

 

multiple choice

  • In increasing order of their processing times
  • In the order they arrived
  • In decreasing order of their priority/weight
  • In decreasing order of the ratio of weight to processing time

 

 

The theory of constraints is most applicable in which of the following processes?

 

multiple choice

  • An auto repair shop with one mechanic
  • A chemical processing plant with numerous pieces of equipment with significant setup times and a large number of products, each requiring different sequences of resources to be completed
  • A well-balanced assembly line that makes lawnmowers

 

 

Why does the theory of constraints advocate that a manager’s attention be directed to the bottleneck of a process?

 

multiple choice

  • It is useful to lower the utilization of the bottleneck.
  • The bottleneck has considerable influence on the average flow rate of a process.
  • It is important to minimize the buffer inventory in front of the bottleneck.
  • First-come-first-served scheduling of jobs at the bottleneck ensures that all jobs have the same expected waiting time before they are processed at the bottleneck.

 

 

Which of the following statements best explains why an organization would use weighted shortest processing time instead of shortest processing time?

 

multiple choice

  • Jobs differ in how important it is for them to be completed quickly.
  • It wants to minimize the average flow time across all jobs.
  • WSPT is a simple rule to implement because jobs are processed in the order in which they arrive.
  • It wants to minimize the average number of jobs in the system waiting to be processed.

 

 

The intuition behind the MAE metric to evaluate old forecasts is

 

multiple choice

  • to sum up the forecast errors.
  • to sum up the squared forecast errors.
  • to sum up the absolute values of the forecast errors.
  • to average the squared forecast errors.
  • to average the absolute values of the forecast errors.

 

 

What is the definition of a forecast error?

 

multiple choice

  • The average difference between the forecast and the actual outcome
  • The maximum difference between the forecast and the actual outcome
  • The difference between the forecast and the actual outcome

The percentage difference between the forecast and the actual outcome

 

 

Jobs have different processing times and due dates. If a job is finished earlier than its due date but one day sooner than expected, how does this change the job’s tardiness?

 

multiple choice

  • Tardiness decreases by one day.
  • Tardiness does not change.
  • Tardiness increases by one day.
  • It is not possible to determine the impact on the tardiness of the job with the given information.