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Daily Management
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Attention each day to those issues concerned with the normal operation of a business.
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Days supply of inventory (DSI)
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Total number of days (if the production level equals zero) that it would takes to deplete finished goods inventory for the specified product line based on customer demand.
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Defect
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One of the 8 wastes. Any activity, service or product that is not done right the first time.
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Deming Cycle
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The concept of continuously rotating wheel used by W. E. Deming to emphasize the necessity of constant interaction among research, design, production, and sales so as to arrive at an improved quality that satisfies customers (see PDCA Cycle)
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Dependent Events
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Events that occur only after a previous event.
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DET
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See Detectability
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Detectability
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Used in the FMEA to rate the ability to detect the cause of a failure mode. Also known as Detection.
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DF
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Degrees of Freedom – The number of independent pieces of information that can be used to estimate a statistic. We earn one df for every data point we take and we use one up for every statistical parameter we estimate. The more df’s we have in a sample the closer we come to a normal distribution
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DFM
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Design for Manufacturability – Involves a team effort of product design, production knowledge, Engineering…to develop product which can be produced in the most efficient way.
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Discrimination
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Technological ability of the measurement system to adequately differentiate between values of a measurement parameter.
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DMAIC
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The basic model for Six Sigma. Involves: Define, Measure, Analyze, Improve & Control
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DOE
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Design Of Experiment – Statistically planned experimental exploration and/or confirmation of critical inputs from the FMEA, multi-vari study or process map.
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DPMO
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Defects per Million Opportunities – a measure of the potential for a defect, also used to convert into a Sigma for the process, a measure of quality of the process.
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DPU
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Defects per Unit – Any time a customer requirement is not met, sometimes known as escapes.
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Drift
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The inherent shift of a process, measurement, or statistic over a period of time.
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DSO
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Days Sales Outstanding – a measure of lack of cash flow.
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