Exam 22: Simulation

A simulator is a general purpose simulation model.

A local legal aid office provides basic legal assistance to walk-in clients.The historical arrival frequency is as shown below: Service times are characterized by a normal distribution with a mean of 10 minutes and a standard deviation of 4 minutes.They are interested in using simulation to find the total amount of service time for each hour of a six-hour working day.They generated the following random numbers for hours 1-6 respectively: 63, 13, 67, 50, 71, and 25. a.On a scale of 00-99, what random number range corresponds to 3 clients arriving per hour? b.What is the number of clients arriving in hour 4? c.What is the total service time in minutes for hour 1?

Which of the following is not an advantage of simulation?

Needing the actual time of arrival and actual time of serving relates best with

The table below shows the frequency of service times for a drive-through window. a.If the first category (service time of 1 minute) started with random number 00, determine the random numbers for a service time for Category 5, five minutes. b.Determine the random numbers for a service time of seven minutes if the first category starts at random number 00.

A pastry store wants to know how many dozen muffins to bake each day.Every dozen they sell fresh in the shop returns a profit of $5.00.Every dozen they bake but do not sell on the day they are baked is given to a local charity at a loss of $3.00 a dozen.The business is fairly stable in that they never sell less than 50 dozen nor more than 80 dozen muffins.Their sales history, rounded to the nearest ten dozen muffins is as shown: They want to run a ten day simulation for production rates of 50, 60, 70, and 80 muffins to determine the profit (loss) for each.They generated the following random numbers for days 1-10 respectively: 63, 13, 67, 50, 71, 25, 44, 00, 56, and 68. a.What range of random numbers corresponds to 70 muffins sold? b.What is the profit for day 3 if they make 70 dozen muffins? c.What is the average daily profit (for all ten days) corresponding to 60 dozen muffins made?

The queuing model operating characteristics formula only characterizes short-term average results and, in many practical situations, managers are interested in understanding long-term dynamic behaviors of queuing systems

Given the table below with information on lead-time, followed by a set of six random numbers, determine the average lead-time. RANDOM NUMBERS: 90, 52, 54, 47, 56, 95

Differentiate and explain the importance of verification and validation.

A disadvantage of simulation models is that the structuring is highly dependent on the expertise of the modeler.

The Excel function RAND ( ) generates random numbers that provide a continuous range of values.Unlike those for two-digit numbers, these values are not limited to probability increments of 0.01.

Under what situation would an analytical queuing model be used? When would a simulation model be used?

'Balking' means a customer finds the wait while in line too long and thus leaves the line.

Discuss three advantages and three disadvantages of simulation models.

Discuss a simulator.How does it differ from simulation software such as ProcessModel?

Validation consists of all of the following except

Larry sells sweatshirts at football games.The quantity supplied to him is sometimes less than he ordered.The probability distribution below shows the probability of these shortages. Simulate the average number of shortages for 15 consecutive orders, using the following single digit random numbers: 1, 6, 8, 3, 4, 5, 7, 0, 3, 8, 9, 3, 2, 4, 2.

In regard to a simulation model for inventory management, all of the following are correct except