OPMT 303: Ch. 10 Definitions
24 Cards in this Set
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Quality Control
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A process that evaluates output relative to a standard and takes corrective action when output doesn't meet standards
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Inspection
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Appraisal of goods or services
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Quality of Conformance
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A product or service conforms to specifications
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Statistical Process Control (SPC)
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Statistical evaluation of the output of a process
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Random Variation
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Natural variation in the output of a process, created by countless minor factors
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Assignable Variation
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In process output, a variation whose cause can be identified. A nonrandom variation
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Sampling Distribution
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A theoretical distribution of sample statistics
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Central limit theorem
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The distribution of sample averages tends to be normal regardless of the shape of the process distribution
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Control Chart
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A time ordered plot of sample statistics, used to distinguish between random and nonrandom variability
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Control Limits
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The dividing lines between random and nonrandom deviations from the mean of distribution
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Type I Error
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Concluding a process in not in control when it actually is
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Type II Error
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Concluding a process is in control when it is not
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Variables
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Generate data that are measured
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Attributes
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Generate data that are counted
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Mean control chart
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Control chart used to monitor the central tendency of a process
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Range Control Chart
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Control chart used to monitor process dispertion
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P-Chart
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Control chart for attributes, used to monitor the proportion of defective items in a process
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C-Chart
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Control chart for attributes, used to monitor the number of defects per unit
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Run Test
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A test for patterns in a sequence
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Run
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Sequence of observations with a certain characteristic
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Specifications
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A range of acceptable values established by engineer design or customer requirements
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Process Variability
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Natural or inherent variability in a process
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Process Capability
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The inherent variability of process output relative to the variation allowed by the design specification
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Capability Index
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Used to asses the ability of a process to meet specifications
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OPMT 303: Scheduling