Consider an airport where taxis and customers arrive (exponential interarrival times) with respective rates of 1 and 2 per hour. No matter how many other taxis are present, a taxi will wait. If an arriving customer does not find a taxi, the customer immediately leaves. (a) Model this system as a birth-death process (Hint: determine what the state of the system is at any given time and draw a rate diagram.) (b) Find the average number of taxis that are waiting for a customer. (c) Suppose all customers who use a taxi pay a $2 fare. During a typical hour, how much revenue will the taxis receive in total?




Consider an airport where taxis and customers arrive (exponential interarrival times) with respective rates of 1...
Consider a taxi stand where inter-arrival times of the taxis and the customers are both exponential with means of 0.5 and 1 minutes, respectively. Stand has 3 spots that taxis can park while waiting for the arriving customers. Arriving taxis leaves the stand when all the spots are occupied. Similarly, arriving customers are also lost when there is no taxi in the stand. a. Model this system as a birth and death process by defining the state and the state...
On average, 90 patrons per hour arrive at a hotel lobby (interarrival times are exponential) waiting to check in. At present there are five clerks, and the patrons wait in a single line for the first available clerk. The average time for a clerk to service a patron is 3 minutes (exponentially distributed). Clerks earn $10 per hour, and the hotel assesses a waiting time cost of $20 for each hour a patron waits in line. The hotel is considering...
Waiting lines Customers walk in at random to a deli. The interarrival times are exponentially distributed with an average of 5 minutes. The deli prepares one order at a time. The order preparation times are exponentially distributed with an average of 3 minutes. 13. What kind of waiting line model is appropriate for the deli? 14. What is the utilization? 15. What is the total amount of time a customer would expect to spend at the deli (from walking in...
Rapid Bank always has three tellers on duty. Customers arrive to receive service from a teller at a mean rate of 45 per hour. A teller requires an average of 3 minutes to serve a customer. When both tellers are busy, an arriving customer joins a single line to wait for service. Experience has shown that customers wait in line an average of 1.5 minutes before service begins.Determine the basic measures of performance – ??, ?, ??, and ? –...
Customers arrive at the coffee shop in Bilkent FBA atrium, with a mean rate of 80 per hour (assume Poisson). It takes the barista, on average 30 seconds per cup of coffee (assume Exponential). Assume also that each customer buys only one cup. Determine: (a) The average number of customers waiting in line. (b) The average time customers spend in the system. (c) The average number of customers in the system. (d) The probability that a customer will not have...
**LOOKING FOR FORMULAS, ANSWERS PROVIDED. Problem-1: At a single-phase, multiple-channel service facility, customers arrive randomly. Statistical analysis of past data shows that the interarrival time has a mean of 20 minutes and a standard deviation of 4 minutes. The service time per customer has a mean of 15 minutes and a standard deviation of 5 minutes. The waiting cost is $200 per customer per hour. The server cost is $25 per server per hour. Assume general probability distribution and no...
4. Consider an M/M/1 queueing system with total capacity N 2. Suppose that customers arrive at the rate of λ per hour and are served at a rate of 5 per hour. (a) What should be so that an arriving customer has a 50% chance of joining the queue? (b) With A chosen to satisfy part (a), what percentage of customers who enter the system get served immediately? (a)12.9 customers hour (b)0.38 Stochastic process
175-5.* A service station has one gasoline pump. Cars wanting gasoline arrive according to a Poisson process at a mean rate of 15 per hour. However, if the pump already is heing used, these po- tential customers may balk (drive on to another service station). In particular, if there are n cars already at the service station, the prob- ability that an arriving potential customer will balk is n/3 for n 1. 2, 3. The time required to service a...
QUESTION 1 Customers arrive at a hair salon according to a Poisson process with an average of 16 customers per hour. Which of the following is most likely true, based on this information: a. The hair salon serves customers on a walk-in basis (rather than by appointment times) b. If 10 customers arrive in the first hour, it is likely that 22 customers will arrive in the next hour. c. If the salon can serve an average of 20 customers...
Subject: Broadband Networks.
4. A bank has 4 tellers with different service rates, i.e., teller 1 averages 10 customers/hour, teller 2 averages 15 customers/hour, teller 3 averages 12 customers/hour, and teller 4 averages 10 customers/hour (all with exponential service times). Assume that there are 20 seats in the lobby, and any customer arriving to a fully-occupied lobby leaves. a. If the system is modeled as a Markov chain, what is the total number of states? b. What is the average...