Rockwell Automation Arena Packaging Users Guide - Manual (Page 99)

A • E QUIPMENT R ELIABILITY AND L OSS
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Production-based loss
“About 1% of the units processed through this machine are lost.”
“In general, 2% of the units transferred off this conveyor are lost.”
The second type of loss is simply a general loss rate that occurs as the equipment
processes or transfers units. This production-based loss is defined as a percentage of the
equipment’s total output rate. You enter the loss percentage in the Lost Production
operand.
As an example, if a lost production of 10% was defined for a machine, one unit would be
lost for every nine good units produced. For a conveyor, one bad unit would be transferred
off the conveyor and lost for every nine good units transferred downstream.
During the simulation, the total output rate of a piece of equipment always equals its good
output rate plus its loss rate. In other words, the following equation is always true.
Output Rate = Good Output Rate + (Lost Production % * Output Rate)
where
(Lost Production % * Output Rate) is the loss rate.