Operations Management: Processes and Supply Chains, Student Value Edition Plus MyLab Operations Management with Pearson eText -- Access Card Package (12th Edition)
12th Edition
ISBN: 9780134855424
Author: Lee J. Krajewski, Manoj K. Malhotra, Larry P. Ritzman
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter B, Problem 13P
Summary Introduction
Interpretation: Whether the manager should hire any new personnel and the recommendations to the manager are to be concluded.
Concept Introduction: Poisson distribution is the tool helps to calculate the probability of happening in fixed period of time. Exponential distribution is the expected value of time elapsed between the two events.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Failsafe Textiles employs three highly skilled maintenanceworkers who are responsible for repairing the numerous in-dustrial robots used in its manufacturing process. A workercan fix one robot every 8 hours on average, with an exponen-tial distribution. An average of one robot fails every 3 hours,according to a Poisson distribution. Each down robot coststhe company $100.00 per hour in lost production. A newmaintenance worker costs the company $80.00 per hour insalary, benefits, and equipment. Should the manager hireany new personnel? If so, how many people? What would yourecommend to the manager, based on your analysis?
Failsafe Textiles employs three highly skilled maintenance workers who are responsible for repairing the numerous industrial robots used in its manufacturing process. A worker can fix one robot every 8 hours on average, with an exponential distribution. An average of one robot fails every 3 hours, according to a Poisson distribution. Each down robot costs the company $100.00 per hour in lost production. A new maintenance worker costs the company $80.00 per hour in salary, benefits, and equipment. Should the manager hire any new personnel? If so, how many people? What would yourecommend to the manager, based on your analysis?
A copier machine has a mean time between failures of 400 operating hours. Repairs typicallyrequire an average of 10 hours from the time that the repair call is received until service is completed. Determine the availability of this copier
Chapter B Solutions
Operations Management: Processes and Supply Chains, Student Value Edition Plus MyLab Operations Management with Pearson eText -- Access Card Package (12th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, operations-management and related others by exploring similar questions and additional content below.Similar questions
- Blue Lotus is a bike shop located near a beach resort, which rents its bikes to guests staying in the resort. When a customer requests to rent a bike and no bikes are available (they are either with another customers or being cleaned for rental), customer waits until a bike is available. Once a bike rented out to a customer, the customer keeps it for an average of 1 day. Upon return, the bike is cleaned and tuned-up, which takes half a day (0.5 day). Suppose Blue Lotus has 7 bikes, and demand for bike rental is 4.1 per day. What is the average amount of time a customer waits to receive a bike? (Hint: From the perspective of customer waiting time, 0.5 day of cleaning time would be part of the processing time" so, p = 1+0.5 =1.5 days. Assume CVa = CVp = 1 in your calculations). O 1.197 days O2.134 days O 0.761 days O 5.380 daysarrow_forwardPerformance Evaluation and Risk Aversion Jill Lewis is the office manager of PureBreds Inc.Her office has 30 employees whose collective job is to process applications by dog owners whowant to register their pets with the firm. There is never a shortage of applications waiting to be processed, but random events beyond Lewis’s control (e.g., employees out sick) cause fluctuations inthe number of applications that her office can process. Jill is aware that it is important that the applications be processed quickly and accurately. Alex Zale, the district manager to whom Jill reports,bases his evaluation of Jill on the number of applications that are processed.Required1. If Jill is risk averse, how should Alex compensate her? Why?a. Flat salary.b. Straight commission based on the number of applications processed.c. Flat salary with a bonus based on the number of applications processed.d. Flat salary with a bonus based on the firm’s earnings.2. What is a disadvantage of an evaluation method…arrow_forwardNavern Corporation manufactures and sells custom home elevators. From the time an order is placed until the time the elevator is installed in the customer's home averages 141 days. The 141 days are spent as follows: Wait time Inspection time Process time Move time Queue time What is Navern's manufacturing cycle efficiency (MCE) for its elevators? Multiple Choice O O 41.1% 30.4% 58.9% 29 days 24 days 34 days 31 days 23 days 57.4%arrow_forward
- A large food-processing corporation is considering using laser technology to speed up and eliminate waste in the potato-peeling process. To implement the system, the company anticipates needing $3 million to purchase the industrial-strength lasers. The system will save $1,200,000 per year in labor and materials. However, it will incur an additional operating and maintenance cost of $250,000 per year. Annual income taxes will also increase by $150,000. The system is expected to have a 10-year service life and a salvage value of about $200,000. If the company's MARR is 18%,justify the economics of the project using the PW method.arrow_forwardIn a company two mechanics maintain two very important machines in a production process, which usually break down on average every 16 hours. This time between breakdowns has an exponential distribution. A mechanic spends on average 10 hours repairing a machine (time with exponential distribution). Determine how much time a machine spends on average in the system.arrow_forwardA 10 station automated assembly system produces an ideal cycle time (Tc) of 14 seconds/cycle. When a defective part enters any assembly station it sometimes causes a station jam or stoppage. Defective parts occur at a rate of 0.07 and a jams due to defective parts occur at a rate of 0.4. When a jam occurs, it takes on average 74 seconds to clear and restart the station. Determine the production rate of acceptable parts (Rap) to the nearest 1 part/hour.arrow_forward
- A crew of mechanics at the Highway Department Garage repair vehicles that break down at an average of λ = 8 vehicles per day (approximately Poisson in nature). The mechanic crew can service an average of μ = 11 vehicles per day with a repair time distribution that approximates an exponential distribution. The crew cost is approximately $300 per day. The cost associated with lost productivity from the breakdown is estimated at $150 per vehicle per day (or any fraction thereof). What is the probability that there are more than two vehicles in the system?arrow_forwardDuring a plant start-up, the operators should go through the start up sequence quickly to reduce the downtime and increase the profitability of the plant. there should be as few operators as possible near the column to ensure that any major accidents will result in lower injuries and fatalities. the operators should fully depend on the automated start up sequence without any intervention to increase the smoothness of the start up. Othere should be as many operators as possible near the column to ensure that any operational emergencies can be safely and quickly managed.arrow_forwardAn average of 1200 parts arrive to the EP chamber during an 8-hour workday. Each part goes through two stages of processing. At each stage, a single product is processed at a time, and processing takes an average of 15 seconds at the first station and 12 seconds at the second station. Inter-arrival times and service times are exponentially distributed. At the end of the second step, the product goes through a quality check. 5% of the parts fail the quality check and are sent back to the second stage of service. Parts exit the system only after they pass the quality check. Ignoring the time required to perform the quality check or in moving the part through the facility, what is the average cycle time for parts?arrow_forward
- A graphics reproduction i rm has four units of equipment that are automatic but occasionallybecome inoperative because of the need for supplies, maintenance, or repair. Eachunit requires service roughly twice each hour, or, more precisely, each unit of equipmentruns an average of 30 minutes before needing service. Service times vary widely, rangingfrom a simple service (such as pressing a restart switch or repositioning paper) to moreinvolved equipment disassembly. The average service time, however, is i ve minutes.Equipment downtime results in a loss of $20 per hour. The one equipment attendant ispaid $6 per hour.Using i nite queuing analysis, answer the following questions:a. What is the average number of units in line?b. What is the average number of units still in operation?c. What is the average number of units being serviced?d. The i rm is considering adding another attendant at the same $6 rate. Should the i rmdo it?arrow_forwardA 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?arrow_forwardIt takes a service rep an average of 1.5 minutes to take a customer's information. Over the course of a workday, the rep handles 150 calls a day during her eight-hour shift. The service rep's utilization (in %) is %. (Enter your response rounded to one decimal place)arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Practical Management ScienceOperations ManagementISBN:9781337406659Author:WINSTON, Wayne L.Publisher:Cengage,
Practical Management Science
Operations Management
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:Cengage,