Exam 20: Simulation

________ is the act of reproducing the behavior of a system using a model that describes the processes of the system.

________ uses random numbers to generate simulation events.

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 how many total customers arrived during the 2-hour period simulated?

Using a simulation model to gather a year of operating data in a few minutes is known as:

What are the differences between decision variables and uncontrolled variables? Describe the differences and provide an example from a simulation model.

How can random numbers be generated?

Steady state occurs when the simulation is repeated over enough time that the average results for performance measures remain constant.

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 how much time did the average customer who entered the system spend waiting in line?

When using Excel for simulation,it is important to freeze the random numbers used in order to compare the effectiveness of different policies.To do this,you must select the cells holding the random numbers with the mouse,click Edit/Copy at the top of the spreadsheet,and:

Refer to the bank process model.The bank's process improvement group has developed a number of process and technology changes that will improve the Teller's process rate per customer from a mean of 3.0 minutes to 2.5 minutes (standard deviation remains at 0.5 minutes).The Bank Manager wants to determine if the improved process rate,along with the special promotion for new customers,will allow the "arrive and immediately leave" rate and average customer wait time in line achieved in Problem #45 to still be met (12% balk rate,9.95 minutes in line).If so,the manager will implement the process and technology changes and allow the special promotion to proceed.Using SimQuick,estimate the new arrive and immediately leave rate and average time in line.What decision should the manager make?

________ occurs when the simulation is repeated over enough time that the average results for performance measures remain constant.

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 0.7406

SimQuick can be used to simulate all of the following EXCEPT:

What is steady state in a simulation model? Why is it important to achieve steady state?

Simulation models are:

Monte Carlo simulation is the use of computer graphics to show customers or products moving through a series of process steps.

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 waiting in line at any point of time is an example of a(n):

To generate 80 random numbers in an Excel simulation,the "=RAND()" function is first typed into the C2 cell on an Excel spreadsheet.C2 is then copied and pasted in a rectangular area on the spreadsheet to cover the cells:

What is the difference between a waiting line model as described in Supplement B and a simulation model of a waiting line problem?

Random variables are under the control of the decision maker.