In a lightbulb manufacturing system, on average 1 lightbulb arrives every 0.5 hours. The average processing time of the system is 20 minutes for each lightbulb. There are two processing units. What is the probability that both processing units are idle? (percentage)
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- Do: 12-21 Truck drivers working for Juhn and Sons (see Problems 12-19 and 12-20) are paid a salary of $20 per hour on average. Fruit loaders receive about $12 per hour. Truck drivers waiting in the queue or at the loading gate are drawing a salary but are productively idle and unable to generate revenue during that time. What would be the hourly cost savings to the firm associated with employing two loaders instead of one? Not this: 12-19 Juhn and Sons Wholesale Fruit Distributors employs one worker whose job is to load fruit on outgoing company trucks. Trucks arrive at the loading gate at an average of 24 per day, or 3 per hour, according to a Poisson distribution. The worker loads them at a rate of 4 per hour, following approximately the exponential distribution in service times. Not this: 2-20 Juhn believes that adding a second fruit loader will substantially improve the firm’s efficiency. He estimates that a two-person crew, still acting like a single-server system, at the loading…Bank with 2 tellers. Customers arrive at a rate 80 per hour and wait in a single line. Average time to serve is 1.2 minutes per customer What is the expected number of customers present in the bank? = What is the expected length of time a customer spends in the bank? = What is the fraction of time any specific teller is idle? = probability that the system is empty + 0.5(probability that the system has 1 customer* 08 HI FL R %S4 LLI %#3 50 For the first two hours of the day, the arrival rate at the donut shop is 10 customers per hour. The donut shop is capable of serving 8 customers per hour. Assume that the system is empty at the start and that no customer who arrives leaves without being served. (Round your answer to 2 decimal places.) What is the average wait time for customers during this time period (in hours)? unoy nces Mc Graw Wellington Paranormal Stars and Pahkitew Island RESTAURANT Restaurant: Scissor Seven My 600-lb Life The Afterparty Pam & Tommy As We See It 8,425 MAR étv A 644 DD F7 F12 F8 F10 F3 F 4 F5 93 %23 5 delet 9 7. 2. } P. 1 B. W N alt 38 command MOSISO command
- A supermarket has more than one server servicing at counters. The customer arrives in a Poisson fashion at the rate of 10 per hour. The service time for each customer is expected with a mean of 4 minutes. Find the probability of a customer has to wait for the service, average queue length, the average time spent by a customer in the queue.2. A repair and inspection facility consists of two stations: a repair station with two technicians, and an inspector station with 1 inspector. Each repair technician works at the rate of 3 items per hour; the inspector can inspect 8 items per hour. Approximately 10% of all items fail inspection and are sent back to the repair station. (This percentage holds even for items that have been repaired two or more times.) If items arrive at the rate of 5 per hour, what is the long-run expected delay that items experience at each of the two stations, assuming a Poisson arrival process and exponentially distributed service times? What is the maximum arrival rate that the system can handle without adding personnel?Calls arrive at Lynn Ann Fish's hotel switchboard at a rate of 2.5per minute. The average time to handle each is 10seconds. There is only one switchboard operator at the current time. The Poisson and negative exponential distributions appear to be relevant in this situation. a) The probability that the operator is busy = enter your response here (round your response to two decimal places). b) The average time that a caller must wait before reaching the operator = enter your response here minutes (round your response to two decimal places). c) The average number of calls waiting to be answered = enter your response here calls (round your response to two decimal places).