Operations Management
17th Edition
ISBN: 9781259142208
Author: CACHON, Gérard, Terwiesch, Christian
Publisher: Mcgraw-hill Education,
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Chapter 18, Problem 10CQ
Summary Introduction
To determine: The effect on tardiness of a job when the job is completed one day earlier.
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Shortest processing time minimizes the flow time of jobs at a resource because itreduces the processing times of the jobs. True or false?a. Trueb. False
Depending on how jobs arrive to a resource, it is possible that the average flow time of the jobswith first-come-first-served is lower than that with shortest processing time. True or false?a. Trueb. False
The earliest-due-date rule always minimizes the maximum tardiness across jobs. True orfalse?a. Trueb. False
Chapter 18 Solutions
Operations Management
Ch. 18 - Prob. 1CQCh. 18 - Prob. 2CQCh. 18 - Prob. 3CQCh. 18 - Prob. 4CQCh. 18 - Prob. 5CQCh. 18 - Prob. 6CQCh. 18 - With weighted shortest processing time, jobs are...Ch. 18 - Prob. 8CQCh. 18 - Prob. 9CQCh. 18 - Prob. 10CQ
Ch. 18 - Prob. 11CQCh. 18 - Prob. 12CQCh. 18 - Prob. 13CQCh. 18 - Prob. 14CQCh. 18 - Prob. 15CQCh. 18 - Prob. 16CQCh. 18 - Prob. 1PACh. 18 - Prob. 2PACh. 18 - Prob. 3PACh. 18 - Prob. 4PACh. 18 - Prob. 5PACh. 18 - Prob. 6PACh. 18 - Prob. 7PACh. 18 - Prob. 8PACh. 18 - Prob. 9PACh. 18 - Prob. 10PACh. 18 - Prob. 11PACh. 18 - Prob. 12PACh. 18 - Prob. 13PACh. 18 - Prob. 14PACh. 18 - Prob. 15PACh. 18 - Prob. 1CCh. 18 - Prob. 2CCh. 18 - Prob. 3CCh. 18 - Prob. 4C
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- Suppose there is a set of jobs to be processed at a resource. Shortest processing timealways sequences the jobs in a different order than first-come-first-served. True or false?a. Trueb. Falsearrow_forwardCompared to high school, college students: a. have more free time between classes b. are expected to consult the course syllabus for assignments and deadlines c. should spend 2 to 3 hours on course work outside of class for each hour in class d. all of the abovearrow_forwardLine processes generally have lower volumes as compared to job processes. True Falsearrow_forward
- ________blank refers to a work arrangement that gives employees flexibility in terms of both hours and where they work. Multiple Choice Compressed workweek Work-life balance Telecommuting Flextimearrow_forwardBackground Info A "Visit" is an instance of a person coming to a website A "visitor" is a person who conducts a visit on a website An "Order" is an instance of someone making a purchase "Conversion rate" is defined as the number or orders per visit The home page of a web site can be "split" into two versions ("A" and "B") that have different characteristics (e.g. layout, products, etc.) These different versions can then be shown to different visitors on a random basis For example, 75% of visitors would see version A and 25% of visitors would see version B Scenario You are determining which home page version is the best choice for the site to maximize the number of orders. A two week split test was set up where visitors were randomly (but not necessarily equally) assigned to one home page or another, and the number of visitors to each homepage and the related orders were accurately recorded by day. The additional traffic on the 7th and 14th is due to some banner ads running on MSN on…arrow_forwardRaquel is concerned with effi ciency. She believes it isprobably more effi cient to use SPT (shortest processing time) asher priority rule.(a) Develop a sequence using SPT based on processing timefor preparing the area.(b) Calculate the makespan, the mean job fl ow time, and theaverage number of jobs in the system.arrow_forward
- Which of the following is a benefit of overbooking a resource?a. It helps to reduce the average number of jobs waiting to be processed on the resource.b. It helps to reduce the average flow time of jobs through a resource.c. It helps to increase the utilization of the resource.d. It helps to reduce the processing times of jobs at a resource.arrow_forwardConsider a business process in which each order that arrives is split into two jobs that are performed in parallel and are then rejoined before leaving the system. Assume no variance in inter-arrival times nor in process times for each task. Each station (depicted by a rectangle) contains one or more identical parallel servers (depicted by circles). Each server is independent of all others and can work on one job at at a time. Process times for individual servers at station A are 5 minutes. Servers at stations B and C have process times of 3 and 6 minutes respectively. Consider the system with one server per station. What is this system's capacity? What is the cycle time for each order through the entire process flow?arrow_forwardConsider a business process in which each order that arrives is split into two jobs that are performed in parallel and are then rejoined before leaving the system. Assume no variance in inter-arrival times nor in process times for each task. Each station (depicted by a rectangle) contains one or more identical parallel servers (depicted by circles). Each server is independent of all others and can work on one job at at a time. Process times for individual servers at station A are 5 minutes. Servers at stations B and C have process times of 3 and 6 minutes respectively. Consider the system with one server at each of the stations A and B as before, and two identical parallel servers (each with a 6 minute process time) at station C. What is the system's capacity? What is the cycle time for each order through the entire process flow?arrow_forward
- Which of the following is not a typical component of activity models? Events to start and stop the workflow. Sequence of flow between tasks. Decision points that affect the process flow. Multiplicities. Store by store profitability for Costco is an example of: Enterprise System. Discretionary information. Information overload. Mandatory information.arrow_forwardTime study mainly addresses:a) Timing all workers’ performances for setting standardtimesb) Improving the working environment for setting standardtimesc) Timing a sample of worker’s performance for settingstandard timesd) Timely review of the workloads for setting standardtimese) All of the abovearrow_forwardWithin a workplace, a worker describes how his co-workers leave business documentson the reception desk and personal belongings within the conference room when theirmanager is absent. How would this affect the functioning of a company?a. The company would not be able to complete its tasks efficiently. b. The company would not be able to complete its tasks effectively.c. Both a and b are correctd. Both a and b are incorrectarrow_forward
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