Operations Management
13th Edition
ISBN: 9781259667473
Author: William J Stevenson
Publisher: McGraw-Hill Education
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Question
Chapter 7, Problem 11P
Summary Introduction
To determine: The number of observations needed.
Introduction: The amount of the dependency on human effort by an organization in terms of achieving its goals is given by the work design. It is directly linked to the productivity of an organization where good work design helps in achieving high productivity.
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How many observations should a time study analyst plan for in an operation that has a standard deviation of .4 minutes per piece if the goal is to estimate the mean time per piece to within .1 minute with a confidence of 95.5 percent?
oPERATION MANAGEMENT
How many observations should a time study analyst plan for in an operation that has a standard deviation of 1.1 minutes per piece? The goal is to estimate the mean time per piece to within 0.4 minutes, with a confidence of 95.5 percent. (Do not round intermediate calculations. Round up your final answer to the next whole number.).
Chapter 7 Solutions
Operations Management
Ch. 7.S - Prob. 1DRQCh. 7.S - Prob. 2DRQCh. 7.S - Prob. 3DRQCh. 7.S - Prob. 4DRQCh. 7.S - Prob. 5DRQCh. 7.S - Prob. 6DRQCh. 7.S - Prob. 7DRQCh. 7.S - Prob. 8DRQCh. 7.S - Prob. 9DRQCh. 7.S - Prob. 10DRQ
Ch. 7.S - Prob. 1PCh. 7.S - Prob. 2PCh. 7.S - Prob. 3PCh. 7.S - Prob. 4PCh. 7.S - Prob. 5PCh. 7.S - Prob. 6PCh. 7.S - Prob. 7PCh. 7.S - Prob. 8PCh. 7.S - Prob. 9PCh. 7.S - Prob. 10PCh. 7.S - Prob. 11PCh. 7.S - Prob. 12PCh. 7.S - Prob. 13PCh. 7.S - Prob. 14PCh. 7.S - Prob. 15PCh. 7.S - Prob. 16PCh. 7.S - Prob. 17PCh. 7.S - Prob. 18PCh. 7.S - Prob. 19PCh. 7.S - Prob. 1CQCh. 7.S - Prob. 2CQCh. 7.S - Prob. 3CQCh. 7 - Prob. 1DRQCh. 7 - What are some of the main advantage and...Ch. 7 - Prob. 3DRQCh. 7 - Prob. 4DRQCh. 7 - Prob. 5DRQCh. 7 - Prob. 6DRQCh. 7 - Prob. 7DRQCh. 7 - What are motion study principles? How are they...Ch. 7 - Prob. 9DRQCh. 7 - Prob. 10DRQCh. 7 - Prob. 11DRQCh. 7 - Prob. 12DRQCh. 7 - Prob. 13DRQCh. 7 - Prob. 14DRQCh. 7 - Prob. 15DRQCh. 7 - Prob. 16DRQCh. 7 - Prob. 17DRQCh. 7 - Prob. 18DRQCh. 7 - Prob. 19DRQCh. 7 - Prob. 1TSCh. 7 - Prob. 2TSCh. 7 - Prob. 3TSCh. 7 - Prob. 1CTECh. 7 - Prob. 2CTECh. 7 - Prob. 3CTECh. 7 - Prob. 1PCh. 7 - Prob. 2PCh. 7 - Prob. 3PCh. 7 - Given these observed times (in minutes) for four...Ch. 7 - Prob. 5PCh. 7 - Prob. 6PCh. 7 - Prob. 7PCh. 7 - Prob. 8PCh. 7 - Prob. 9PCh. 7 - Prob. 10PCh. 7 - Prob. 11PCh. 7 - Prob. 12PCh. 7 - Prob. 13PCh. 7 - An analyst made the following observations about...Ch. 7 - Prob. 15PCh. 7 - Prob. 16PCh. 7 - Prob. 17PCh. 7 - Prob. 18PCh. 7 - Prob. 19P
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- A hotel housekeeper, Alison Harvey, was observed five times on each of four task elements, as shown in the following table. Performance Observation (minutes per cycle) Element Rating 1 2 3 4 5 Check minibar 98 % 1.6 1.7 1.5 1.4 1.4 Make one bed 92 % 2.2 2.6 2.0 2.2 2.5 Vacuum floor 125 % 1.7 1.8 2.0 1.4 1.6 Clean bath 102 % 3.5 3.5 3.6 3.5 3.1 Assume a 12% allowance factor. Part 2 The standard time for this process = enter your response here minutes (round your response to two decimal places).arrow_forwardThe data in the following table represent time-studyobservations for an assembly process at Nagesh Murthy's ToyFactory. On the basis of these observations, find the normal timefor each element and the standard time for the process. Assume aI 0% a llowance factor.arrow_forwardIn making a time study, differentiate elements and cycles. What is the advantage of breaking an operation into a more detailed list of elements?arrow_forward
- Identify to which category of “personal”, “fatigue”, or “delay” the following job elements belong to a) The hair-dresser takes the phone to confirm a booking, in the middle of a client haircut. b) The doctor takes a cup of coffee and a quick rest in a short time between visiting two patients. c) In a long-distance drive, the coach driver stops in a service area every two to three hours to have some food.arrow_forwardwhat are the advantages and disadvantages of continuous and snapback method of time study.arrow_forwardK Latisha Simmons, a loan processor at Wentworth Bank, has been timed performing four work elements, with the results shown in the following table. Task Element 1 2 3 4 Performance Rating 115% 95% 85% 80% 1 0.5 0.6 0.7 1.6 Observation (minutes per cycle) 2 3 4 0.4 0.9 0.4 1.9 0.5 0.7 0.6 2.1 0.3 0.6 0.4 1.7 5 0.3 0.7 0.4 1.5 The allowances for tasks such as this are personal, 8%; fatigue, 10%; and delay, 2%. a) The normal time for the complete operation = minutes (round your response to two decimal places). b) The standard time for this process = minutes (round your response to two decimal places).arrow_forward
- Latisha Simmons, a loan processor at Wentworth Bank, has been timed performing four work elements, with the results shown in the following table. Task Element 1 2 3 4 Performance Rating 110% 85% 90% 85% 1 0.6 0.6 0.5 1.4 Observation (minutes per cycle) 2 3 4 0.3 0.8 0.5 1.9 0.6 0.7 0.6 1.9 0.4 0.6 0.5 1.7 The allowances for tasks such as this are personal, 8%; fatigue, 12%; and delay, 3%. minutes (round your response to two a) The normal time for the complete operation : = decimal places). b) The standard time for this process = minutes (round your response to two decimal places). 0.5 0.8 0.5 1.4arrow_forwardDevelop an event process chain (EPC) diagram for the following staff-recruiting process at Yellow Brook Photography: • The current recruitment process for Yellow Brook Photography takes approximately 90 days. It begins when a manager completes a requisition and sends it to the Human Resources Department. The Human Resources Department reviews and assigns a number to the requisition and returns it to the manager for approval. He or she approves it, obtains the required approval signatures, and then returns it to Human Resources. • Next, Human Resources creates a job posting and announces the position internally through the company’s intranet, bulletin boards, or a binder of current job openings. Human Resources collects responses internally for eight days. After that, Human Resources solicits résumés from external sources by advertising in newspapers and online. Human Resources then prescreens the résumés and forwards information on qualified candidates to the hiring manager for review.…arrow_forwardDescribe the idea behind the term "procedure." What makes a process different from a planned activity?arrow_forward
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