Practical Management Science
6th Edition
ISBN: 9781337406659
Author: WINSTON, Wayne L.
Publisher: Cengage,
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- Ron Satterfield's excavation company uses both Ganit scheduling charts and Gantt load charts. Today, which is the end of day 7, Ron is reviewing the Gantt chart depicting these schedules: Job #151 was scheduled to begin on day 3 and to take 5 days. It got started on time and is 1 day ahead of schedule. Job #177 was scheduled to begin on day 1 and take 4 days. It is currently on time. Job #179 was scheduled to start on day 6 and take 2 days. It actually got started on day 5 and is progressing according to plan. Job #211 was scheduled to begin on day 5, but missing equipment delayed it until day 6. It is progressing as expected and should take 3 days. Job #215 was scheduled to begin on day 5 and take 5 days. It got started on time but has since fallen behind 1 day. This exercise contains only part a a) Add the actual progress to the Gantt schedule shown on the right (on which the planned timings have been already plotted as blue lines). Using the line drawing tool, plot the actual…arrow_forwardexplain Workcenter Scheduling?arrow_forwardA defense contractor in Dallas has six jobs awaiting processing. Processing time and due dates are given in the table. Assume that jobs arrive in the order shown. Compare the average completion time, utilization, average jobs in the system and average job lateness of the following scheduling rules. Start date is day 1. a) SPT: shortest processing time and b) EDD: earliest due datearrow_forward
- Five customers brought in computers to be repaired to a small shop. Estimated repair times (in days) and dates promised are given below. Due dates were set based on available technicians; however, one technician had a medical emergency and will be unavailable for at least two weeks so processing times were adjusted. Customer job 1 Processing time (days) Due date (days) 6 Use the EDD rule and compute the start time, flow time, lateness, and tardiness for each job. Use minus sign to enter negative lateness values, if any. If your answer is zero, enter "0". Sequence Start Time, days Flow Time, days Lateness, days Tardiness, days -Select- -Select- -Sclect. -Select- -Select- UI 5 LI TE 10 MAarrow_forwardWhat method uses more processing time and resources: preemptive or non-preemptive scheduling?arrow_forwardHow to solve scheduling issuesarrow_forward
- The following jobs are waiting to be processed at the same machine center. Jobs are logged as they arrive: In what sequence would the jobs be ranked according to the following decision rules: (a) FCFS, (b) EDD, (c) SPT, and (d) LPT? Alldates are specified as manufacturing planning ca.lendar days. Assumethat all jobs arrive on day 275. Which decision is best and why?arrow_forwardClasses are scheduled. After students request courses, a programme will determine the optimum schedule. The school thinks it can't find the best schedule soon. Instead, they use a simpler method to construct a reasonable but non-optimal schedule quicker. Which principle does this option demonstrate?arrow_forwardWhy is managing bottlenecks so important in workcenter scheduling?arrow_forward
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