Business Process Modeling Simulation And Design 3rd Edition Manuel Laguna, Johan Marklund - Solutions

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Under what legal form will you trade and why?
What professional advisers (accountant, lawyer, patent agent, etc)have you used, or do you plan to use?
How will you ensure that your key staff are motivated and loyal during the start-up period?
What people (or skill) gaps are there in the organization you need to run your business? How do you plan to fill them?
Draw an organization chart showing who is responsible for which functions.
Who else will be working with you and what relevant experience and skills do they have?
What experience and skills do you have that are particularly relevant to this venture?
What is your business name and why have you chosen it?
How did you arrive at your new idea?
If you are considering a franchise or network marketing opportunity, have you discussed the projections provided with a professional advisor?
How much money do you think will be needed to get your business started? Provide a short ‘shopping list’ of major expenses.
List your tasks and action plans as you see them at present.
What are your principal objectives:(a) short term?(b) long term?
Write a mission statement linking your product or service to the customer needs it is aimed at.
What makes you believe it will succeed?
Explain how you arrived at your proposition.
Warehouse Efficiency. A distribution system for a large grocery chain consists of 25 warehouses. The director of logistics and transportation would like to evaluate the relative efficiency of each warehouse. Warehouses have a fleet of trucks to deliver grocery items to a set of stores within their
Consider the linear programming model for Process D shown in Section 11.3.2.The manager of Process D has suggested the use of the following weight values:h1 = 0.4 , h1 = 0.75 , and g = 1 .The manager argues that if each process is allowed to choose weights to maximize its efficiency, he should be
In some applications of DEA, it has been suggested to impose limits on the weight values for all the processes; that is, the application considers that each weight must be between some specified bounds. Under which circumstances would it be necessary to impose such a range?
Do you think it is possible for a process to appear efficient simply because of its pattern of inputs and outputs and not because of any inherent efficiency? Give a numerical example to illustrate this issue.
One major concern with the DEA approach is that with a judicious choice of weights, a high proportion of processes in the set will turn out to be efficient, and DEA will thus have little discriminatory power. Can this happen when a process has the highest ratio of one of the outputs to one of the
Use the graphical approach to DEA and the data in Table 11.16 to determine the efficiency of each process.
Apply the k-NN classifier to the data in Exercise 3. Use the classifier with k = 3 to make decisions with respect to the five loan applications in Part (b) of Exercise 3.Are the recommendations from the k-NN classification rule the same as those found with the application of the classification
The manager of a commercial loan department for a bank wants to develop a rule to make loan application decisions.* The manager believes that liquidity, profitability, and activity are the three key indicators of performance that are helpful in making a decision on a company’s loan application.
An if-then statement is the simplest form of the inference block of a business rule.A set of “if-then” statements is such that the “if” is the condition of the rule, and the “then” is the action. Typically, rules that are based on multiple if-then statements are evaluated sequentially,
Business intelligence and business process management.* Nearly all business processes involve complex value-based decision points, such as loan approvals or up-sell opportunities. Complex decision making may require information that often is not delivered within the workflow, and decision makers
(Adapted from Khoshnevis, 1994) The management of a major ski resort wants to simulate the rental program during the high season. The resort has two types of customers: people who pay cash and people who use a credit card. The interarrival times of these customers is exponentially distributed with
With a preliminary simulation of 10 days of operation of an emergency room, an analyst found the results shown in Table 9.40 in terms of the average number of patients waiting. Suppose the analyst would like to estimate the average number of patients waiting with a 95 percent confidence interval
An analyst has suggested a new design for the process in Exercise 14. A simulation of the proposed process yielded the WIP values in Table 9.39. Test the hypothesis that the new process has a mean WIP that is less than the average of the old process.Assume a 5 percent significance level.
The data set in Table 9.38 represents the WIP at the end of a day for a 40-day simulation of a given business process. Find a 99 percent confidence interval for the mean WIP.
Use the data in Exercise 4 to generate random variates from an exponential distribution with a mean of 25.
Use the data in Exercise 4 to generate random variates from the discrete probability distribution function in Table 9.37.
Perform the following tests on the numbers generated in Exercise 10:a. Test for randomness using Kolmogorov–Smirnov with a significance level of 0.05.b. Test for independence using the runs test with a 0.05 level of significance.
Use the linear congruential method with parameters Z0 = 79, a = 56214, c = 17, and m = 999 to generate 10 three-digit random numbers.
Starting with a seed of 3461, generate 10 four-digit random numbers using the mid-square method.
The data set in Table 9.36 consists of cycle times of jobs in a given process. Perform the runs test to determine with a 99 percent confidence level whether or not the cycle times (ordered by columns) are independent.
Consider the data in Exercise 4. Perform the runs test to determine with a 95 percent confidence level whether or not the numbers in the sequence (ordered by rows) are independent.
Apply the Kolmogorov–Smirnov test to the data in Exercise 2.
Apply the Kolmogorov–Smirnov test to the data in Exercise 1.
Use the Kolmogorov–Smirnov test to examine on the significance level of 0.01 whether the observations in Table 9.35 are random numbers uniformly distributed between 0 and 1.
An analyst is interested in determining whether the Weibull distribution with parametersα = 6 and β = 10 is a good fit to the data set in Table 9.34. Use Microsoft Excel to perform a Chi-square goodness-of-fit test to help the analyst make a decision.
Use the Chi-square goodness-of-fit test and a significance level of 0.05 to test the set of service times in Table 9.33 for possible fit to the normal distribution.
Use the Chi-square goodness-of-fit test and a significance level of 0.1 to test the set of interarrival times in Table 9.32 for possible fit to the exponential distribution.
Figure 8.69 shows the flowchart of a business process that receives an average of one job every 10 minutes with a standard deviation of 2.5 minutes. The actual interarrival times approximately follow a normal distribution. The processing times are exponentially distributed with the mean values (in
Priority Queues—A business process consists of six activities, as shown in the flowchart of Figure 8.68. The activity times (in minutes) are normally distributed with mean values of 15, 10, 8, 8, 13, and 7, respectively, for Activities A through F.Similarly, the standard deviations are 3, 2.5, 2,
Multiple Queues—The order fulfillment process of an entrepreneurial catalog business operates as follows. Orders arrive with exponential interarrival times with a mean of 10 minutes. A single clerk accepts and checks the orders and processes payment. These activities require a random time that is
Variable Resource Availability—Travelers arrive at the main entrance door of an airline terminal according to an exponential interarrival time distribution with a mean of 1.6 minutes. The travel time from the entrance to the check-in is distributed uniformly between 2 and 3 minutes. At the
Assessing Process Performance—The process of insuring a property consists of four main activities: review and distribution, underwriting, rating, and policy writing.Four clerks, three underwriting teams, eight raters, and five writers perform these activities in sequence. The time to perform each
Investigating the Effect of Rework Rates—A proposed business process consists of five serial workstations. One caseworker is positioned in each workstation. The processing times at each workstation are exponentially distributed with mean values of 11, 10, 11, 11, and 12 minutes, respectively. The
Investigating the Effect of Pooling Resources—Three types of jobs arrive to a process at a rate that randomly varies between two and five jobs per hour; that is, the interarrival times are governed by a uniform distribution with mean equal to three and a half jobs per hour.The process is
Measuring Cycle Times of Different Types of Jobs—Three types of jobs arrive to a process at a rate of four jobs per hour. The interarrival times are exponentially distributed.On average, 40 percent of the jobs are Type I, 35 percent are Type II, and 25 percent are Type III. It can be assumed that
Grocery Store—You are hired by Safeway to help them build a number of simulation models to better understand the customer flows and queuing processes in a grocery store setting. The pilot project at hand focuses on an off-peak setting where at most two checkouts are open. To better understand the
Bank Tellers—Consider a banking system involving two inside tellers and two drive-in tellers. Arrivals to the banking system are either for the drive-in tellers or for the inside tellers. The time between arrivals to the drive-in tellers is exponentially distributed with a mean of 1 minute. The
Inventory System—A large discount store is planning to install a system to control the inventory of a particular video game system. The time between demands for a video game system is exponentially distributed with a mean time of 0.2 weeks.In the case where customers demand the system when it is
Airline Ticket Counter—At an airline ticket counter, the current practice is to allow queues to form before each ticket agent. Time between arrivals to the agents is exponentially distributed with a mean of 5 minutes. Customers join the shortest queue at the time of their arrival. The service
A bank with five tellers opens its doors at 9 a.m. and closes its doors at 5 p.m., but it operates until all customers in the bank by 5 p.m. have been served. Assume that the interarrival times of customers are exponentially distributed with a mean of 1 minute and that the service times of
A service facility consists of two servers in series (tandem), each with its own FIFO queue. (See Figure 8.63.) A customer completing service at Server 1 proceeds to Server 2, and a customer completing service at Server 2 leaves the facility. Assume that the interarrival times of customers to
For the single-server queuing system in Exercise 1b, suppose the queue has room for only three customers and that a customer arriving to find that the queue is full just goes away (balk). Simulate this process for 5000 minutes and estimate the same quantities as in Part (b) of Exercise 1 as well as
Consider a single-server queuing system for which the interarrival times are exponentially distributed. A customer who arrives and finds the server busy joins the end of a single queue. Service times of customers at the server are also exponentially distributed random variables. On completing
The owner of a ski apparel store in Winter Park, CO must make a decision in July regarding the number of ski jackets to order for the following season. Each ski jacket costs $86 and can be sold during the ski season for $245. Any unsold jackets at the end of the season are sold for $55. Historical
Through statistical analysis of historical data, Mile High Airlines has determined that the demand for one of its flights follows a Poisson distribution with a mean of 150 passengers. It has also determined that, out of the booked passengers, the number that actually show up for the flight follows
The Maestranza Hotel in downtown Málaga has 94 rooms for which it charges$143 per night. An occupied room costs the hotel $28 in operating costs. There is a 4.5 percent chance that a guest with a booked reservation does not show up. The number of booked guests that show up at the hotel follows a
An online retailer would like to predict total revenues for 2019 based on the 2018 revenues and the estimated growth in each of five departments. The estimates are summarized in Table 7.13. The retailer believes that any of the growth rates between the minimum and the maximum are equally likely to
A process manager is considering automating a bottleneck operation. The operation receives between three and nine jobs per hour in a random fashion. The cost of waiting associated with the jobs is estimated at $2.20 per hour. The team’s equipment choices are specified in Table 7.12. Develop a
At Letchworth Community College, one person, the registrar, registers students for classes. Students arrive at a rate of 10 per hour (Poisson arrivals), and the registration process takes 5 minutes on average (exponential distribution). The registrar is paid$5 per hour, and the cost of keeping
The chief of staff in the emergency room of Exercise 6.22 is considering the computerization of the admissions process. This change will not reduce the 10-minute service time, but it will make it constant. Develop a spreadsheet simulation to compare the performance of the proposed automated process
Use the spreadsheet template in Table 7.11 to simulate a customer service desk with two servers. The start time of the process is 9:00 a.m. (Cell C4), and the interarrival times (Cells B5 to B14) are given in minutes. Assume that the process consists of a single queue operating under a
Perform the steps in the drive-through simulation that remain to empty the event calendar of Table 7.7. Calculate the statistics at the end of these events. Was Car 8 able to enter the drive-through?
Perform a web search of “business process simulation” and prepare a short report of your findings.
List a few entities, attributes, activities, events, and state variables for the following processes:a. Check-out process at a grocery storeb. Admission process at hospitalc. Insurance claim process
The engineering firm AllDesign is reviewing the process for handling customer requests for a certain type of assignment. The requests arrive according to a Poisson process with a mean arrival rate λ = one request per day, and the company considers two different process alternatives. The first one
The BlockBlaster store has only one cashier working at a time. Assume that the customers arrive to the cashier according to a Poisson process with average rate of 1 customer per minute. When comparing the service times of two cashiers that work different shifts, some differences in service time
Consider a bank office where customers arrive according to a Poisson process with an average arrival rate of λ customers per minute. The bank has only one teller servicing the arriving customers. The service time is exponentially distributed, and the mean service rate is μ customers per minute.
At Martha’s café, Martha herself operates the espresso machine. Customers arrive and demand cups of espresso according to a Poisson process with an average rate of 30 cups per hour. The time it takes for Martha to make a cup of espresso is exponential with a mean of 75 seconds.a. Determine L,
A railroad company paints its own railroad cars as needed. The company is about to make a significant overhaul of the painting operations and needs to decide between two alternative paint shop configurations.Alternative 1: Two “wall to wall” manually operated paint shops, where the painting is
The manager of a grocery store is interested in providing good service to the senior citizens who shop in his store. The manager is considering the addition of a separate checkout counter for senior citizens. It is estimated that the senior citizens would arrive at the counter at an average of 30
A case team completes jobs at a rate of two per hour, with actual processing times following an exponential distribution. Jobs arrive at a rate of about one every 32 minutes, and the arrival times are also considered exponential. Use queuing theory to answer the following questions.a. What is the
Truckloads of seasonal merchandise arrive to a distribution center within a 2-week span. Because of this, merchandise-filled trucks waiting to unload have been known to back up for a block at the receiving dock. The increased cost due to unloading delays, including truck rental and idle driver
The arrival and service rates in Table 6.8 pertain to telephone calls to a technical support person in a call center on a typical day. Both the interarrival times and the service times are exponentially distributed.a. Determine the average time the callers wait to have their calls answered for each
Consider a cashier at a grocery store. Customers arrive at this cashier’s station according to a Poisson process with a mean of 25 customers per hour. The cashier’s service times are exponentially distributed with a mean of 2 minutes. By hiring a person to help the cashier bag the groceries and
A fast food chain is opening a new restaurant in a shopping mall. The restaurant needs to hire a cashier and has two prime candidates. Candidate 1 is experienced and fast but demands a higher salary. Candidate 2 is inexperienced and slower but also has more modest salary claims. The question is
Most arrivals to a hospital emergency room are not considered emergencies, in that the patients can wait to see a doctor until they complete the proper forms.At County Hospital, emergency patients arrive at a rate of six per hour. This process is, to no one’s surprise, a Poisson arrival process.
A process has a bottleneck resource that consists of specialized equipment. Jobs arrive to this machine at a rate of 40 per hour (according to a Poisson arrival process).The processing times average 1 minute and are exponentially distributed.Compare the performance (e.g., average cycle time through
The manager of a movie theater would like to predict the consequences of adding a second ticket clerk. Data show that arrivals to the theater are Poisson distributed at a rate of 250 per hour, and service times are exponentially distributed with a mean of 12 seconds. The manager has also estimated
A company has a central document-copying service. Arrivals can be assumed to follow a Poisson process, with a mean rate of 15 per hour. It can be assumed that service times are exponentially distributed. With the present copying equipment, the average service time is 3 minutes. A new machine can be
A facility management company has recently acquired a number of new commercial properties within the city of Greenfield. They are faced with the problem of hiring a number of on-call janitors, who are responsible for fixing emergency problems that arise at these different facilities. The question
Plans are being made to open a small gas station in a central location in Springfield.The owner must decide how much space should be provided for waiting cars. This is an important decision, since land prices are high. It is assumed that customers (cars)arrive according to a Poisson process with a
A workstation has enough storage space for storing three jobs in addition to the one being processed. Excess jobs are routed to another workstation, which is used solely to handle this overflow of jobs from the regular workstation. Jobs arrive to the regular workstation according to a Poisson
Consider the description of Problem 14.a. Identify an appropriate queuing model that adequately describes the queuing process. Use the corresponding formulae to determine Pn, n = 0, 1, 2, 3, …, L, Lq, W, Wq.b. Determine the fraction of time that the mechanic is busy.c. Determine the fraction of
A mechanic is responsible for keeping two machines in working order. The time until a working machine breaks down is exponentially distributed with a mean of 12 hours. The mechanic’s repair time is exponentially distributed with a mean of 8 hours.a. Show that this queuing process is a
A telecommunications company receives customer calls at a rate of 25 per hour. The interarrival times are exponentially distributed. Each call requires, on the average, 20 minutes. The times for each call also follow an exponential distribution.a. What is the minimum number of customer service
A pharmaceutical company has formed a team to handle FDA applications for approval of new drugs. Requests for applications arrive at a rate of one every year.The arrivals follow a Poisson process. On average, the team processes an application in 9 months. The company estimates that the average cost
Consider an M/M/2 model. Derive the following expressions by constructing the rate diagram and solving the balance equations.ρ = λ/(2μ)P0 = (1 − ρ)/(1 + ρ)Pn = 2ρnP0 L = 2ρ/(1 − ρ2)Lq = 2ρ3/(1 − ρ2) = L − 2ρ(Hint: Look at the technique used to derive the corresponding results for
A small machine shop consists of three sensitive machines that break down frequently but independently of each other. The company has two service technicians on standby to repair the machines as soon as they break down. For each fully functional machine, the breakdown rate is 0.1 times per hour,
A gas station has a single automated carwash. Cars arrive to the gas station according to a Poisson process with an average of 30 cars per hour. One-third of the customers also want a carwash; that is, for every customer, there is a 33.33 percent chance it needs a carwash. The mean service rate is
The mean service and arrival rates for a birth-and-death process describing a queuing system with two parallel servers are given in Table 6.6.a. Construct the corresponding rate diagram.b. Develop the balance equations and solve them to determine the stationary probabilities for finding n customers
Consider a birth-and-death process with mean birth and death rates, λn and μn, shown in Table 6.5.a. Construct a rate diagram.b. Calculate the stationary probabilities for finding the process in state n, n = 0, 1, 2, 3, ….c. If a queuing process with two identical servers fits this
A queuing process is modeled as a birth-and-death process with mean arrival rates λ0 = 2, λ1 = 4, λ2 = 3, λ3 = 1, λn = 0 for n > 3 and mean service rates μ1 = 2, μ2 = 4, μ3 = 1 and μn = 0 otherwise.a. Construct a rate diagramb. Develop the balance equations and solve them to obtain Pn, n
It has been concluded that a single-server queuing system with exponentially distributed service and interarrival times can be modeled as a birth-and-death process with state-dependent mean service and arrival rates, μn and λn, respectively.μn n n== for otherwise 0 1 2 3 0, , ,n n n=− =
A small branch office of a local bank has two tellers for which customers line up in a single queue. The customers are being served on an FCFS basis. It has been determined that the steady-state probability distribution for finding exactly n customers in the system, {Pn, n = 0, 1, 2 ...}, is P0 =

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Business Process Modeling Simulation And Design 3rd Edition Manuel Laguna, Johan Marklund - Solutions

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