required to operate the process (which can be indicated with an the available working time per shift at that process (in seconds, minus break, meeting, and cleanup times); and machine uptime information.
In the "stamping" data box we also show EPE, which stands for and is a measure of production batch every part every size. For example, if you change over to produce a particular part once every three days, then the production batch size is about three days worth of parts. Notice that the cycle time is the time between parts coming off the end of the process and not the total cycle time it takes one part to move through all process steps. Also notice that available work time divided by cycle time multi- plied by uptime percent is a measure of current process capacity, if no changeovers are made.
Note: Value stream mapping uses seconds as the time unit for cycle times, takt times, and available working times. Many of you have been taught to use decimal minutes to measure time, but that unit is unnecessarily complicated. Value stream mapping is a tool everyone should be able to use.
As you walk the product's material flow you will find places where inventory accumulates. These points are important to draw on the current state map because they tell you where the flow is stopping. We use a "warning triangle" icon to capture the location and amount of inventory. (If the inventory accumulates in more than one location between two processes, draw a triangle for each location.)
required to operate the process (which can be indicated with an the available working time per shift at that process (in seconds, minus break, meeting, and cleanup times); and machine uptime information. In the "stamping" data box we also show EPE, which stands for and is a measure of production batch every part every size. For example, if you change over to produce a particular part once every three days, then the production batch size is about three days worth of parts. Notice that the cycle time is the time between parts coming off the end of the process and not the total cycle time it takes one part to move through all process steps. Also notice that available work time divided by cycle time multi- plied by uptime percent is a measure of current process capacity, if no changeovers are made. Note: Value stream mapping uses seconds as the time unit for cycle times, takt times, and available working times. Many of you have been taught to use decimal minutes to measure time, but that unit is unnecessarily complicated. Value stream mapping is a tool everyone should be able to use. As you walk the product's material flow you will find places where inventory accumulates. These points are important to draw on the current state map because they tell you where the flow is stopping. We use a "warning triangle" icon to capture the location and amount of inventory. (If the inventory accumulates in more than one location between two processes, draw a triangle for each location.)
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