Ch 10

Operations Management

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10-1 Chapter 10 Quality Control
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10-2 Involves examining items to see if an item is good or defective Detect a defective product Does not correct deficiencies in process or product Issues (a) How much and how often to inspect (b) At what points (where) in the process to inspect (c) Centralized vs. on-site location inspection (d) Count (attributes) vs. measure (variables) Inspection
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10-3 Where to inspect At a point where a process has a tendency to go out of control At a point where a process is particularly harmful and costly if it goes out of control Examples at the beginning of a process because it is a waste of time and money to begin production process with bad supplies before a costly or irreversible point , after which product is difficult to rework or correct before and after assembly or painting operations that might cover defects before the outgoing final product or service is delivered
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10-4 How much to inspect Costs Amount of Inspection
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10-5 Statistical Quality Control Statistical Process Control (SPC) Acceptance Sampling Control Chart for Variable Control Chart for Attribute Statistical Quality Control (SQC)
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10-6 Statistical Process Control (SPC) Sample subset of items produced to use for inspection Control Charts graphs that visualize whether a process is within statistical control limits UCL UCL LCL
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10-7 Statistical Process Control (SPC) Random variation common causes inherent in a process can be eliminated only through improvements in the system Non-Random variation special causes due to identifiable factors can be modified through operator or management action
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10-8 Statistical Process Control (SPC) Attribute a product characteristic that can be evaluated with a discrete response (Ex.) good or bad; yes or no Variable a product characteristic that is continuous and can be measured (Ex.) Weight, length, volume
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10-9 Steps of Statistical Process Control Produce Good Provide Service Stop/slow Process Yes No Take Samples Inspect Samples Find Out Why Create Control Create Control Charts Charts Start Can we assign causes?
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10-10 Control Charts R Chart Variables Charts Attributes Charts X Chart P Chart C Chart Measurable Numerical Data Countable Numerical Data Types of Control Charts
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10-11 Control Chart UCL LCL Mean Out of control Normal
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Ch 10 - Chapter 10 Quality Control 10-1 Inspection Involves...

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