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Exam 20: Simulation

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Question 21

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Scenario E.1 SimQuick is being used to simulate the following bank process: Customer arrivals at the Entrance Door of the bank with an average time between arrivals of 2.5 minutes.The Line Buffer holds 6 customers.If a customer arrives and the buffer line is filled,the customer leaves.The Work Station Teller's processing time per customer is normally distributed,with a mean of 3.0 minutes and a standard deviation of 0.5 minutes.The Served Customer Buffer in the flow chart is used to count the number of customers processed during the period simulated.A 2-hour period was simulated. The SimQuick simulation is run,and the results are as follows: -Use the information in Scenario E.1.Approximately what percentage of total customers who arrived during the 2-hour period found the buffer full and were not able to enter?

A) 87%
B) 13%
C) 94%
D) 6%

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Question 22

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A simulation model is used to test the impact of the number of sample customers at a supermarket.As the model is run,the decision maker watches the average number of customers in the store rapidly increase from zero until it levels off and holds a constant value.The simulation model is:

A) not valid due to the lack of change.
B) in steady state.
C) not valid due to the fluctuation in the statistics.
D) a random variable.

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Question 23

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Refer to the bank process model.The Marketing Department for the bank has decided to run a special promotion for new customers that will increase the number of customers arriving at the bank.The new arrival rate is expected to be an average time between arrivals of 2.0 minutes instead of the current average time between arrivals of 2.5 minutes.With the potential increase in business,the bank manager is concerned about the number of customers who will arrive and leave because the line is full (with 6 customers)and the average wait time in line at the bank.All other parameters of the model remain the same.Using SimQuick,estimate the new arrive and immediately leave rate and average time in line.Should the manager be concerned?

________ are random events that the decision maker cannot control.

Time compression is the feature of simulation that allows managers to obtain operating-characteristic estimates in much less time than is required to gather the same operating data from a real system.

A variable that is controlled by the decision-maker and will change from one run to the next as different events are simulated is a(n)________.

What are the motivations for using simulation for analyzing processes?

SimQuick is to be used to simulate the following bank process: Customers arrive at the Entrance Door of the bank with an average time between arrivals of 2.5 minutes The Line Buffer holds 6 customers.If a customer arrives and the buffer line is filled,the customer leaves.The Work Station Teller's processing time per customer is normally distributed,with a mean of 3.0 minutes and a standard deviation of 0.5 minutes.The Served Customer Buffer in the flowchart is used to count the number of customers processed during the simulation period.A 2-hour period is to be simulated and the simulation should be repeated 30 times.Determine: a)The number of customers served during the 2-hour period; b)The percentage of customers who arrived at the bank and left because the buffer line was full; c)The utilization of the teller (% of time working)during the 2-hour period;

The manager of a branch bank wants to build a simulation model of the lobby operation to reduce the waiting time of her customers.The number of customers arriving at any point of time is an example of a(n) :

This table shows the distribution of grades in an operations management class. Add a column to the table that shows the cumulative probability and indicate what letter grade is obtained when the RAND() function is equal to 0.982245

What is meant by time compression in a simulation model?

Why would data need to be collected prior to conducting a simulation?

________ is a feature of simulation models that allows them to obtain operating-characteristic estimates in much less time than is required to gather the same operating data from a real system.

One hundred monkeys are typing in Excel spreadsheets when one of them enters =NORM.S.INV(RAND() ) What is the result of this monkey's function?

A number that has the same probability of being selected as any other number is a(n)________.

Any random number has the same likelihood of being selected as any other,regardless of how recently it has been selected.

A patient's interminable wait for the first available physician is modeled in SimQuick using a(n) :

Scenario E.1 SimQuick is being used to simulate the following bank process: Customer arrivals at the Entrance Door of the bank with an average time between arrivals of 2.5 minutes.The Line Buffer holds 6 customers.If a customer arrives and the buffer line is filled,the customer leaves.The Work Station Teller's processing time per customer is normally distributed,with a mean of 3.0 minutes and a standard deviation of 0.5 minutes.The Served Customer Buffer in the flow chart is used to count the number of customers processed during the period simulated.A 2-hour period was simulated. The SimQuick simulation is run,and the results are as follows: -Use the information in Scenario E.1.On average,approximately how many customers were waiting in line during the 2-hour simulation period?

A manager has been given the table shown below and is asked to generate random numbers.Which of the following statements is TRUE?

The manager of a branch bank wants to build a simulation model of the lobby operation to reduce the waiting time of her customers.The number of tellers is an example of: