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The main contents of this chapter include all of the following: Work center defined, typical scheduling and control functions, job-shop scheduling, examples of scheduling rules, shop-floor control, principles of work center scheduling, issues in scheduling service personnel. | Chapter 17 Operations Scheduling Work Center Defined Typical Scheduling and Control Functions Job-shop Scheduling Examples of Scheduling Rules Shop-floor Control Principles of Work Center Scheduling Issues in Scheduling Service Personnel OBJECTIVES 2 Work Center A work center is an area in a business in which productive resources are organized and work is completed Can be a single machine, a group of machines, or an area where a particular type of work is done 3 Capacity and Scheduling Infinite loading (Example: MRP) Finite loading Forward scheduling Backward scheduling (Example: MRP) 4 Types of Manufacturing Scheduling Processes and Scheduling Approaches Continuous process Type of Process Typical Scheduling Approach High-volume manufacturing Med-volume manufacturing Low-volume manufacturing Finite forward of process, machine limited Finite forward of line, machined limited Infinite forward of process, labor and machined limited Infinite forward of jobs, labor and some machine limited | Chapter 17 Operations Scheduling Work Center Defined Typical Scheduling and Control Functions Job-shop Scheduling Examples of Scheduling Rules Shop-floor Control Principles of Work Center Scheduling Issues in Scheduling Service Personnel OBJECTIVES 2 Work Center A work center is an area in a business in which productive resources are organized and work is completed Can be a single machine, a group of machines, or an area where a particular type of work is done 3 Capacity and Scheduling Infinite loading (Example: MRP) Finite loading Forward scheduling Backward scheduling (Example: MRP) 4 Types of Manufacturing Scheduling Processes and Scheduling Approaches Continuous process Type of Process Typical Scheduling Approach High-volume manufacturing Med-volume manufacturing Low-volume manufacturing Finite forward of process, machine limited Finite forward of line, machined limited Infinite forward of process, labor and machined limited Infinite forward of jobs, labor and some machine limited 4 Typical Scheduling and Control Functions Allocating orders, equipment, and personnel Determining the sequence of order performance Initiating performance of the scheduled work Shop-floor control 5 Work-Center Scheduling Objectives Meet due dates Minimize lead time Minimize setup time or cost Minimize work-in-process inventory Maximize machine utilization 6 Priority Rules for Job Sequencing 1. First-come, first-served (FCFS) 2. Shortest operating time (SOT) 3. Earliest due date first (DDate) 4. Slack time remaining (STR) first 5. Slack time remaining per operation (STR/OP) 7 Priority Rules for Job Sequencing (Continued) 6. Critical ratio (CR) 7. Last come, first served (LCFS) 8. Random order or whim 8 Example of Job Sequencing: First-Come First-Served Answer: FCFS Schedule Suppose you have the four jobs to the right arrive for processing on one machine What is the FCFS schedule? No, Jobs B, C, and D are going to be late Do all the jobs get done on time? 10 Example of Job Sequencing:
