OM-L5-ch15_Schedule - Chapter 15 Scheduling Operations...

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Chapter 15 Scheduling Operations Management Lesson 8
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Learning Objectives Explain the different kinds of scheduling Describe different shop loading methods Develop a schedule using priority rules Calculate scheduling performance measures Develop a schedule for multiple workstations Describe the theory of constraints Describe scheduling for service applications Develop a workforce schedule in which each employee has two consecutive days off
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Scheduling Definitions Routing: The operations to be performed, their sequence, the work centers visited, & the time standards Bottleneck: A resource whose capacity is less than the demand placed on it Due date: When the job is supposed to be finished Slack: The time that a job can be delayed & still finish by its due date Queue: A waiting line
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Definition Gantt Chart planning and control chart designed to graphically show workloads or to monitor job progress Load Chart workload relative to the capacity at a resource Progress Chart planned schedule as compared to actual performance
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Low-Volume Tool Gantt Charts Developed in the early 1900’s by Henry Gantt Load charts (see below Figure 15.1) Illustrates the workload relative to the capacity of a resource (load chart) Shows today’s job schedule by employee
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Gantt Chart (continued) Progress charts: Illustrates the planned schedule compared to actual performance Brackets show when activity is scheduled to be finished. Note that design and pilot run both finished late and feedback has not started yet.
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Scheduling Work - Work Loading Infinite loading: Ignores capacity constraints, but helps identify bottlenecks in a proposed schedule to enable proactive management Finite loading: Allows only as much work to be assigned as can be done with available capacity but doesn’t prepare for inevitable slippage
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Other Scheduling Techniques Forward Scheduling starts processing immediately when a job is received Backward Scheduling begin scheduling the job’s last activity so that the job is finished on due date
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Monitoring Work Flow Input/Output Control I/O control is a capacity-control technique used to monitor work flow at individual work centers Monitors how well available capacity is used and provides insight into process problems Figure 15-6 Input/output report for work center 101 Input Information (in hours) Period 4 5 6 7 8 Planned Input 800 750 800 820 800 Actual Input 750 780 780 810 810 Deviation -50 30 -20 -10 10 Cumulative deviation 0 -50 -20 -40 -50 -40
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  • One '14
  • Week-day names, work center

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