Principles Of Operations Management
11th Edition
ISBN: 9780135173930
Author: RENDER, Barry, HEIZER, Jay, Munson, Chuck
Publisher: Pearson,
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Chapter 10, Problem 17P
Summary Introduction
To determine: Thenormal time for the operation.
Introduction: Time study is the basis that helps set the standard time; it would time a sample of the performance of the worker.
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A worker-machine operation was found to involve 3.3 minutes of machine time per cycle in the course of 40 cycles of stopwatch study. The worker's time-averaged 1.9 minutes per cycle, and the worker was given a rating of 120% (machine rating is 100%). Midway through the study, the worker took a 10-minute rest break. Assuming an allowance factor of 12% of work time, determine the standard time for this job. Hints: you should consider both machine time and machine time together. Also, Allowance only applies to the man, not a machine.
A worker-machine operation was found to involve 3.3 minutes of machine time per cycle in the course of 40 cycles of stopwatch study. The worker’s time averaged 1.9 minutes per cycle, and the worker was given a rating of 120 percent (machine rating is 100 percent). Midway through the study, the worker took a 10-minute rest break. Assuming an allowance factor of 12 percent of work time, determine the standard time for this job.
Chapter 10 Solutions
Principles Of Operations Management
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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
- Suppose Charlene Brewster has times (in seconds) of 8.3, 8.5, 8.4, 8.4, 8.6, 8.6 and a performance rating of 110%. a) For a given allowance factor of 15%, the standard time for the operation = ? seconds (round your response to two decimal places).arrow_forwardThe cycle time for performing a certain task has been clocked at 13 minutes. The performance rating of Richard Muszynski III was estimated at 120%. Common practice in this department is to allow 6 minutes of personal time and 4 minutes of fatigue time per hour. In addition, there should be an extra allowance of 3 minutes per hour for inspection. a) The normal time for the operation is = ? minutes (round your response to one decimal place).arrow_forwardData Products, Inc., packages and distributes a variety ofpersonal computer-related products. A time study hasbeen conducted for a job packaging 3.5-inch personalcomputer diskettes for shipment to customers. The jobrequires a packager to place 20 diskettes in a rectangularplastic bag, close the bag with a twist tie, and place thefilled bag into a bin, which is replaced by another workerwhen it is filled. The job can be broken into four basic elements. The elemental times (in minutes) were ob-tained from the time study for 10 job cycles shown in the following table. a. Using an allowance factor of 16%, determine the stan-dard time for this job. b. Determine the number of cycles for this time studysuch that the company would be 95% confident that theaverage time from the time study is within 4% of thetrue average cycle time.arrow_forward
- An initial time study was done on a process with the follow-ing results (in minutes). Based on the data obtained so far,assuming an allowance of 20 percent of the normal time,what do you estimate for the time per customer served, basedon this preliminary sample?arrow_forwardPlease do not give solution in image formate thanku. The average observed time for a repetitive work cycle in a direct time study was 5.18 min. The worker’s performance was rated by the analyst at 90%. The company uses a PFD allowance of 12%. ________________ What is the standard time for this task? ________________ In addition, how many units are expected to be completed in an 8-hour shift?arrow_forwardIf Charlene, the worker in Problem( If Charlene Brewster has times of 8.4, 8.6, 8.3, 8.5, 8. 7,and 8.5 and a performance rating of I 10%, what is the normal time for this operation? Is she faster or slower than normal? ) has a performance rating of 90%, what is the normal time for the operation? Is she faster or slower than normal?arrow_forward
- What role does data collection and analysis play in work measurement?arrow_forwardA time study of an employee assembling peanut valves resulted in the following set of observations. What is the standard time, given a performance rating of 97 percent and an allowance of 10 percent of the total normal time? LOADING... Average Time (seconds) Observations 10 15 11 10 15 19 Part 2 The standard time is enter your response here seconds. (Enter your response rounded to two decimal places.)arrow_forwardA recently negotiated union contract allows workers in a shipping department 24 minutes for rest, 10 minutes for personal time, and 14 minutes for delays for each four hours worked. A time study analyst observed a job that is performed continuously and found an average time of 6.0 minutes percycle for a worker she rated at 95 percent. What standard time is applicable for that operation?arrow_forward
- Providence Assessment Center screens and trains employees for a computer assembly firm in Boston. The progress of all trainees is tracked, and those not showing the proper progress are moved to less demanding programs. By the tenth repetition, trainees must be able to complete the assembly task in 1 hour or less. Susan has just spent 5 hours on the fourth unit and 4.5 hours completing her eighth unit, while another trainee, Julie took 4 hours on the third and 2.8 hours on the sixth unit. Should you encourage either or both of the trainees to continue? Why? Present calculation steps. [Hint: For each trainee, 1) Determine the learning rate (%) – use doubling concept. 2) Calculate time for the 1st unit (T1) – use table, 3) Calculate time for the 10th Unit (T10) –use table] Susan Julie Learning rate (%) – doubling concept Time for the 1st unit Time for the 10th unitarrow_forwardJell Lee Beans is famous for its boxed candies, whichare sold primarily to businesses. One operator had the followingobserved times for gift wrapping in minutes: 2.2, 2.6, 2.3, 2.5, 2.4.The operator has a performance rating of 105% and an allowancefactor of 10%. What is the standard time for gift wrapping?arrow_forwardAfter training, Mary Fernandez, a computer technician, had an average observed time for memory-chip tests of 15 seconds. Mary's performance rating is 105%. The firm has a personal fatigue and delay allowance of 12%. a) The normal time for this process = seconds (round your response to two decimal places). b) The standard time for this process =seconds (round your response to two decimal places).arrow_forward
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