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OCC
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Occurrence – as defined in the FMEA
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OEE
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Overall Equipment Effectiveness - OEE = (% Available) x (% of designed output rate) x (% First Pass Yield)
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OFAT
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One Factor at A Time – holding all factors constant while one factor is changed to see its effect on the output. This is the lowest level (less efficient) means of DOE.
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One-piece flow
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See Continuous Flow Production
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Operating Expenses
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The money required the system to convert inventory into throughput
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Operational Planning
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Tactical details for short-term tied into Strategic Plans
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Overproduction
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One of the 8 wastes. Producing more, sooner or faster than is required by the next process.
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