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1 Principles of Cycle Time Reduction Copyright 2000

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3 There are two common definitions: The interval that passes from a given event in one cycle to the same event in the next cycle Cycle Start Cycle Start Well call this the button-to-button time

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4 There are two common definitions: The interval that passes from a given event in one cycle to the same event in the next cycle But this definition is too simplistic… …it doesnt take into account events that do not happen in every cycle If you have a two minute button-to-button time and 1,000 parts to run… …would you complete the production run in 2,000 minutes?

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5 There are two common definitions: The interval that passes from a given event in one cycle to the same event in the next cycle Tool Maintenance

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6 There are two common definitions: The interval that passes from a given event in one cycle to the same event in the next cycle Bar Loading

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7 There are two common definitions: The interval that passes from a given event in one cycle to the same event in the next cycle Sampling Inspections 123456 789101112 131415161718

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8 There are two common definitions: The interval that passes from a given event in one cycle to the same event in the next cycle Personal Time

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9 There are two common definitions: The interval that passes from a given event in one cycle to the same event in the next cycle Machine Down Time Production While the button to button time is important, it isnt a very good way to define cycle time!

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10 There are two common definitions: A more realistic definition… The overall length of time required to complete a production run divided by the number of good workpieces produced Well also call this through-put time

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11 There are two common definitions: A more realistic definition… The overall length of time required to complete a production run divided by the number of good workpieces produced Admittedly, calculating cycle time is more difficult… …but there is much greater potential to reduce cycle time!

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12 There are two common definitions: A more realistic definition… The overall length of time required to complete a production run divided by the number of good workpieces produced Anything that adds to the length of time it takes to complete a production run will be fair game for your cycle time reduction program!

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13 There are two common definitions: By the way… An important comparison Compare to: Button to button time: 2 minutes Throughput time: 3 min, 45 sec One major goal of cycle time reduction is to draw throughput time closer to button to button time!

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