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Maintenance
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Activities that are directed to maintaining current technological, managerial, and operating standards.
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Make One Pass One
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See Continuous Flow Production
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MBB or MBBC
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Master Black Belt or Master Black Belt Candidate
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Mean
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Measure to provide indication of the central tendency of a data set. Sum of all data points divided by the number in sample taken.
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Measurement Error
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Variation in measurements that can be attributed to variation in the item being measured or in the measurement system itself
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Median
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Value falling in the middle of a data set when data are sorted in an order, ascending or descending
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Metrics
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Means of showing business process performance. Can measure inputs (indicators) or outputs. Should include goals and metric ownership.
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Mission Statement
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Describes a company’s product, market, and technological areas in a way that reflects the values and priorities of the business leaders. It is “what they do”.
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Mistake Proofing
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Process, equipment, tools… designed not to allow mistakes to occur
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Mixed Model Production
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Capability to produce a variety of models, that differ in labor and material content, on the same production line. Allows for efficient utilization of resources while providing rapid response to marketplace demands.
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Motion (excessive)
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One of the 8 Wastes. Any motion not needed to add value to product or service.
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mR
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Moving Range
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MSA
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Measurement System Analysis – Identification and quantification of the different sources of variation that are caused by and affecting the measurement system.
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MTBF
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Mean Time Between Failure – Common equipment reliability measure looking at the average time between failures.
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MTTR
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Mean Time to Repair – Looks at the average time to perform equipment repairs.
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Muda
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Japanese for waste. Any activity that adds to cost without adding to value of the product. The seven original wastes. See the first seven of the 8 Wastes.
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Multi-Skilled Worker
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People at any level of the organization that are diverse in skills and training. They provide the organization with flexibility and grow in value over time. Essential for achieving maximum efficiencies of Lean.
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Multi-Variable Chart
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A multi-vari chart is a tool that graphically displays patterns of variation. It is used to identify possible inputs or families of variation, such as variation within a subgroup, between subgroups, or over time.
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Mura
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Japanese for inconsistency or unevennes. Variations in process quality, cost and delivery
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Muri
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Japanese for unreasonableness. Demand exceeds capacity.
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