A production line seldom operates at optimum speed. A myriad of reasons or Negative Performance Impacts, mostly in combination, cause losses in productivity and therefore loss of money. These include:
Line Saturation
There is no place for more output from the machine. For example, a paper machine runs out of empty tambours.
Equipment Failure
Machines break down, wear out, are not used properly and so on. All ends up in lost production time.
Product changes
During the change over from one product to another the machine settings must be changed, breakdown may occur and speed must be reduced.
Short Stops
For example, a bottle falls down in a bottling machine and the operator picks it up. These short but frequent events can be the reason for major time loss.