Concept explainers
Interpretation:
Relation of personal time management with activation and utilization.
Concept Introduction:
In the context of bottleneck management, “activation” refers to
Explanation of Solution
Scheduling an activity automatically does not assure that value will be created at the bottleneck center, as per bottleneck management’s recommendations. To illustrate, if this activity is upstream of the bottleneck, over-activation may create a pile-up of work-in-process inventory accumulating at the bottleneck. This accumulation of half processed materials may hinder the performance operation. Therefore, sometimes it may be beneficial to schedule the idle time of a non-bottleneck activity or underutilization of capacity.
In the case of personal time management, over-activation of multiple activities would stress the individual so much that performance may start dropping. Perhaps, it is better than some idle time in intentionally planned at a person’s time schedule so that there is a proper work-life balance, time for updating of skills, avoid burn-out, and so on.
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Chapter 14 Solutions
Practical Operations Management
- Complete the table; find average lateness, average completion time, and average number of jobs in the system. Assume all durations are in days and that the jobs are processed at the shop in the order that they arrive (A then B then C then D). Today is day 1. Job Process Time Flow Time Due Date Lateness A 15 30 B 3 9 C 12 22 D 15 40 Sum (Average) 45 (11.25) Avg. lateness = ? days Avg. completion time = ?? days Avg. number of jobs in the system = ? jobsarrow_forwardWhat is the trade-offs in the deciding how often to update standard times due to minor changes in work methods?arrow_forwardWhat is standard time amount?arrow_forward
- Briefly describe each of these priority rules:d. S/Oarrow_forwardI only need help with question 4, but question 3 explains how to do 4 but I'm lost. I already have question 3 done. 3. Sequence the jobs shown below by using a Gantt chart. Assume that the move time between machines is one hour. Sequence the jobs in priority order 1, 2, 3, 4. Job Work Center/Machine Hours Due Date (days) Job 1 A/3, B/2, C/2 Job 2 C/2, A/4 Job 3 B/6, A/1, C/3 Job 4 C/4, A/1, B/2 a. What is the makespan? b. How much machine idle time is there? c. When is each job delivered compared with its due date? d. How much idle time (waiting time) is there for each job? e. Devise a better job sequence for processing. 4. In problem 3, assume there are two machines of type A, two of type B, and two of type C. a. Prepare a finite capacity schedule. b. Compare the FCS to the Gantt chart in problem 3.arrow_forwardWhat happens to the non-bottleneck resources when the bottleneck resource is maximized?arrow_forward
- Raquel’s Landscaping Company has contracted forseveral landscaping jobs. Each job requires preparing the areas(identifying the locations and types of plants, preparing the soil,etc.) and then planting the trees, bushes, and shrubs. Th e expectedtime for each of the jobs is shown next. (a) Using FCFS (fi rst come, fi rst served), assume the jobsarrive in the order shown (R, then S, then T, etc.). Showthe beginning and ending time for each job.(b) Calculate the makespan, the mean job fl ow time, and theaverage number of jobs in the system.arrow_forwardGiven this list of tasks, how much idle time is at station 3 if the cycle time is 15 minutes and the Longest Operation Time heuristic is used? Task Duration (min) Predecessor A 8 -- B 7 A C 9 B D 6 C E 7 C F 7 D,E G 9 F H 12 G ANSWER Unselected 3 minutes Unselected 2 minutes Unselected 1 minute Unselected I DON'T KNOW YETarrow_forwardGiven the jobs displayed in Table 18.17, if SPT is used to sequence the jobs, what is theflow time of job F (in minutes)?arrow_forward
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