Lecture Principle of inventory and material management - Lecture 14

Lecture 14 - Production Activity Control (Continued). The contents of this chapter include all of the following: Sequencing, slack, johnson''s rule, monitoring, advance planning and scheduling, TOC, scheduling procedure, employee scheduling.

Production Activity Control (Continued)

Books

• Introduction to Materials Management, Sixth Edition, J. R. Tony Arnold, P.E., CFPIM, CIRM, Fleming  College, Emeritus, Stephen N. Chapman, Ph.D., CFPIM, North Carolina State University, Lloyd M.  Clive, P.E., CFPIM, Fleming College

• Operations Management for Competitive Advantage, 11th Edition, by Chase, Jacobs, and Aquilano, 2005,  N.Y.: McGraw­Hill/Irwin.

• Operations Management, 11/E, Jay Heizer, Texas Lutheran University, Barry Render, Graduate School of  Business, Rollins College, Prentice Hall

Rules: SLACK

A(10­0) – 5 = 5 B(15­0) – 10 = 5 C(5­0) – 2 = 3 D(12­0) – 8 = 4 E(8­0) – 6 = 2

Best values

Sequencing With

Excel

User inputs processing times and sequence

Excel calculates completion times and makespan

When the set of jobs is completed

Planned input 65 65 70 70 270 Actual input 60 60 65 65 250

Planned output 75 75 75 75 300 Actual output 75 75 65 65 280 Deviation -0 -0 -10 -10 -20

User inputs planned and actual values

Excel calculates deviations and backlog

Advanced Planning and Scheduling

– Determines output or throughput of the system

– Communication signal; tells processes upstream when they  should begin production

C1 3 2 C2 1 10 C3 2 15

D1 3 10 D2 2 8 D3 3 5

Item i

Key: i

Ij k l Operation j of item i performed at machine center k takes l minutes

to process

DAY OF WEEK M T W TH F SA SU MIN NO OF

Revised schedule satisfies requirements with consecutive

days off for most employeesEmployee Scheduling

End of Lecture 14