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Process Flow Metrics Work in progress (WIP) Work in queue (WIQ) Touch time Takt time Cycle time Throughput
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Work In Progress (WIP) Partially finished goods waiting for completion and eventual sale of these items. These items are either just being fabricated or waiting for further processing.
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Work in Queue (WIQ) Material at work station waiting to be processed. Some of the Work in Progress may not be in the queue.
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Touch Time Time that material is actually being worked on. This excludes moving, waiting time.
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Takt Time Takt time is the time in which a product needs to be produced in order to satisfy customer demand. Takt time = Net Operating time per period Customer demand per period
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Takt Time For example Customer wants 10 units per week, Plant operates 40 hour per week Takt Time = 40/10 = 4 hrs. Takt time is not related to how much time it takes to make the unit.
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Takt Time For example Customer wants 10 units per week, Plant operates 40 hour per week Two breaks of 10 minutes and 40 minutes lunch break daily. (5 days week) Net operating time = 40 hrs 5x(1 hr)= 35 hrs Takt Time = 35/10 = 3.5 hrs. Takt time is not related to how much time it takes to make the unit.
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Cycle Time Actual time to produce one piece. Takt time = 3.5 hrs Cycle time = 10.5 hrs Process 1 Process 2 Process 3 3.5 Hours 3.5 Hours 3.5 Hours
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