A small call center normally has four employees answering calls while open. On average, seven calls arrive every four minutes. Undernormal operating conditions, each employee on average handles each call in 3.3 minutes. But today, one employee has the flu, so thecenter needs to operate with three employees during this time. The manager is nervous that it may be supply-constrained and so shedirects her employees to hurry up their processing of calls today.What is the maximum average processing time for each call that they need to achieve today so that they have a stable queue?Note: Round your answer to 2 decimal places.Answer is complete but not entirely correct.Maximum average processing time4,73 minutes

Processing time refers to the duration taken for an entire procedure to run and the number of…

Answered: A small call center normally has four…

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

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The magnetic resonance imaging (MRI) unit of St Francis hospital has 2 MRI machines and sees two kinds of patients, "regular" patients and "contrast" patients. The regular patients don't need any special preparation before imaging but the contrast patients receive an injection of "dye" that enables the physicians to see the images more clearly. Regular patients require 15 minutes in an MRI machine whereas contrast patients take on average 25 minutes in an MRI machine. Over an 8-hour day, the MRI unit receives an average of 25 regular patients and 5 contrast patients. (a) What is the implied utilization (as a %) of the MRI unit? % (b) What are the actual and maximum flow rates through the MRI (patients per day)? regular contrast Actual flow rates Max flow rates.
The magnetic resonance imaging (MRI) unit of St Francis hospital has 2 MRI machines and sees two kinds of patients, “regular” patients and “contrast” patients. The regular patients don’t need any special preparation before imaging but the contrast patients receive an injection of “dye” that enables the physicians to see the images more clearly. Regular patients require 15 minutes in an MRI machine whereas contrast patients take on average 25 minutes in an MRI machine. Over an 8-hour day, the MRI unit receives an average of 25 regular patients and 5 contrast patients. Convert the demand and capacity into "hours of work per day" to answer the following questions: (a) What is the implied utilization (as a %) of the MRI unit? % (Round your answer to whole number) Hint: First calculate the demand in hours of work per day: If there are 5 Contrast patients per day and each Contrast patient takes 25 minutes to 'process', how many 'minutes of work' are demanded every day from…
You operate a process with three workstations; the cycle times are given below. A regular batch is 52 units and your production line runs 5 hours per day. Calculate how many hours lead time is required to ship a batch, assuming there are no orders ahead in the queue and there is no inventory to fill the order. Workstation 1 has a cycle time of 2 minutes per unit Workstation 2 has a cycle time of 3 minutes per unit Workstation 3 has a cycle time of 3 minutes per unit Select one: a. 1560.00 b. 8.00 c. 1560.00 d. 90.00 e. 2340.00
A Printed Circuit Board (PCB) machine installs integrated circuits onto a board. Before starting to produce a board, the PCB machine requires a 16-minute setup. Once in production, the PCB machine requires only 0.19 minute per board. a. Currently, the PCB machine produces 525 boards between setups. Given this operating process, what is the capacity of the PCB machine (in boards per min)? b. Currently, the PCB machine produces 525 boards between setups. Given this operating process, what is the utilization of the PCB machine? c. Say the PCB machine produces 400 boards s between setups and demand is 2 boards per minute. Given the operating process, what is the avergae inventory of boards anf the PCB machine? d. Demand for boards occurs at the rate of 2 boards per minute. What is the smallest batch size such that the PCB machine does not constrain the flow rate through the process?
Podunk University Operations Research Departmenthas two phone lines. An average of 30 people per hour tryto call the OR Department, and the average length of aphone call is 1 minute. If a person attempts to call whenboth lines are busy, he or she hangs up and is lost to thesystem. Assume that the time between people attempting tocall and service times is exponential.a What fraction of the time will both lines be free?What fraction of the time will both lines be busy? Whatfraction of the time will exactly one line be free?b On the average, how many lines will be busy?c On the average, how many callers will hang up eachhour?
Consider doctor’s office: Physician’s have 30 min appointment slots starting at 8 AM to 6 PM Physicians spend 90 min (1.5 hrs.) each day on electronic medical records and 30 min on claims processing/questions related to medical insurance Typically, physicians have 75 percent appointments booked in advance, which leads to frequent cancellations. One out of 6 patients do not show up Even though appointment slots are 30 min, physicians spend on average 23 minutes with patient. Out of those 23 min, say 5 min could be done by nurse How much of physician’s work is value added
In general, pooling available safety capacity to serve all customers improves the performance of a service process, as inventory pooling also improved service level. However, if arrivals differ significantly in terms of processing requirements and waiting costs, it may be better to ________ and process them separately, because it will ________ variability in processing time within each class. **segregate; increase **segregate; reduce **pool; reduce **pool; increase Reducing variability in interarrival and processing time is a key to the performance improvement in a process. Which one of the following is NOT an appropriate lever to reduce the variability? **In manufacturing, choose more reliable supplier with consistent delivery time. **In service operations, use reservation or appointments to reduce variability in interarrival times. **Standardize work procedure, lower worker turnover rate to reduce the variability in processing times. **Increase the level of customization to offer a…
You work for a small shipping company and warehouse. The owners have decided to update the software used for tracking, shipping, receiving, and inventory. Fifteen computers need to be updated. Hours of operation are 7 a.m. to 7 p.m. Monday through Saturday. Each computer must be updated manually by one of two trained employees, both of whom must be borrowed from other managers. The update procedure consumes 4 hours of the updater's time and generates an additional 1.5 hours of computer downtime. The work must be performed at a central loading station, away from the current location of the computer. How does the project portfolio management approach lead to enhanced strategic management for an organization and give an example how you woulduse this in a work place?
1. If capacity exceeds demand, then all flow units are served. True or false?a. Trueb. False
Dairy company SG is producing milk at a fixed rate of 5,000 gallons/hour. The total customer order over a day is 100,000 gallons of milk. This demand is distributed evenly from 8:00 am to 6:00 pm. If there is no milk available, customers will wait until enough is produced to satisfy your orders. The company starts to produce at 8 am with 25,000 gallons in finished goods inventory. In the end, after that all the demand has been met, the plant continues producing until the stock of products finished is restored to 25,000 gallons. When answering the following questions, please address the trucks / milk as a continuous flow process. Start by drawing a graphic indicating how much milk is in stock and how much milk is “on hold” throughout the day. a) At what time of day will customers have to wait for their orders to be filled? b) At what time will customers stop waiting? c) Suppose the milk is collected in trucks with a capacity of 1,250 gallons each. What is the maximum number of trucks…
Kitty Wonderland (KW) makes toys for cats. KW’s managers have recently learned that they can calculate the average waiting time for an order from the time an order is received and the time it is manufactured. They have asked for your help and have provided the following information. Expected number of orders for the product: 2,000 Manufacturing time per order: 4 hours Annual machine capacity in hours: 10,000 After learning about the average waiting time, KW’s managers are confused. They do not understand why, if annual machine capacity is greater than the average number of orders for the product, there would be any waiting time at all. Briefly answer the following questions Calculate the average waiting time per order. The managers have asked for your suggestions on what they can do to minimize or eliminate waiting time. How would you respond? Management is expecting sales to increase. Will average waiting time increase or decrease? Explain briefly.
A small mail order firm Seas Beginnings has one phoneline. An average of 60 people per hour call in orders, and ittakes an average of 1 minute to handle a call. Time between calls and time to handle calls are exponentially distributed.If the phone line is busy, Seas Beginnings can put up toc 1 people on hold. If c 1 people are on hold, a callergets a busy signal and calls a competitor (Air End). SeasBeginnings wants only 1% of all callers to get a busy signal. How many people should the company be able to put onhold?

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