CHAPTER 4Takt time and capacity

Often confused with process time or with customer demand, the takttime of a tine actually is the time that must elapse between two successive unit completions in order to meet the demand if the line makes the product one unit at a time at a constant rate during the net available work time. Itis a function of both the demand and the available work time. Assembly lines are designed for a minimum takttime and operated at an actual takt time that is usually longer, and adjusted only in response to major shifts in demand.

Takt-driven production is an ideal, only approximated in real lines, but all deviations from it introduce waste. Itis a global ideal that consists of achieving a local ideal everywhere, and local ...

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