Figure 2.9 Stop-and-Go Production" and "Process-and-Go Production."
retention, and transfer-comprise the four-beat bar of music retention, and that most factories use to add value to materials.
Just as only one four-beat bar can hardly be called music, we need to repeat the bar a number of times to create the "music of production." In view of retention's large role in this type of production, we shall call this type "stop-and-go production." (See Figure 2.9)
Within the four-beat, stop-and-go pattern of this type of production, the beats that take up the lion's share of the manufacturing lead-time are the two "retention" beats. In the example shown in Figure 29, there are eight retention stages from the parts warehouse to the products warehouse. Six of these retention stages are within the factory, where they directly relate to the manufacturing lead-time.