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Topic 5 PowerPoint - 2 - Topic 5 (2) Quality Control Dr....

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Topic 5 (2) Quality Control Dr. Bin Jiang Department of Management
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2 MGT 301 by Dr. Bin Jiang Inspection Transformation Inputs Outputs Process control Acceptance sampling Acceptance sampling
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3 MGT 301 by Dr. Bin Jiang Statistical Process Control (SPC) Invented by Walter Shewhart at Western Electric Distinguishes between common cause variability (random) special cause variability (assignable) Based on repeated samples from a process
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4 MGT 301 by Dr. Bin Jiang Control Chart Control Chart Purpose: to monitor process output to see if it is random A time ordered plot representative sample statistics obtained from an on going process (e.g. sample means) Upper and lower control limits define the range of acceptable variation
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5 MGT 301 by Dr. Bin Jiang Empirical Rule -3 σ μ -1 σ -2 σ +1 σ +2 σ +3 σ 68% 95% 99.7% Upper Limit Lower Limit Expected Output
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6 MGT 301 by Dr. Bin Jiang Control Charts in General Are named according to the statistics being plotted, i.e., X bar, R Have a center line that is the overall average
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This note was uploaded on 05/19/2011 for the course MGMT 101 taught by Professor Steinberg during the Spring '11 term at Ill. Chicago.

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Topic 5 PowerPoint - 2 - Topic 5 (2) Quality Control Dr....

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