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Takt time, derived from the German word Taktzeit, translated best as ''meter'', is the average time between the start of production of one unit and the start of production of the next unit, when these production starts are set to match the rate of customer demand. For example, if the customer wants to buy 10 units per week, and the units are produced during a 40-hour work week, then the average time between the start of one unit and the next should brs, which, given a steady flow through the production plant, will result in a unit being completed every 4 hours (which equates to 10 units per week). A common misconception is that takt time is related to the time it takes to actually make the product - whether it takes 4 minutes to produce the product or whether it takes 4 years to produce the product, the takt time should be 4 hours in this example (of course, the time it takes to produce the product will impact the magnitude of the number of units actually in production at any point in time). ==Definition== Assuming a product is made one unit at a time at a constant rate during the net available work time, the takt time is the amount of time that must elapse between two consecutive unit completions in order to meet the demand. Takt time can be first determined with the formula: : Where T = Takt time, e.g. (time between two consecutive units ) Ta = Net time available to work, e.g. (time per period ) D = Demand (customer demand), e.g. (required per period ) Net available time is the amount of time available for work to be done. This excludes break times and any expected stoppage time (for example scheduled maintenance, team briefings, etc.).
In reality, over the longer term people and machines cannot maintain 100% efficiency and there may also be stoppages for other reasons. Allowances should be made for these instances and thus the line will be set up to run at a faster rate to account for this. Also, takt time may be adjusted according to requirements within the company. For example, if one department delivers parts to several manufacturing lines, it often makes sense to use similar takt times on all lines to smooth out flow from the preceding station. Customer demand can still be met by adjusting daily working time, reducing down times on machines and so on. Some of the early literature uses ''cycle time'' for takt time. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「takt time」の詳細全文を読む スポンサード リンク
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