What are ‘Equivalent Values’
Typically, the output of a machine is specified in a unit of measurement that comes close to the way the operator would count. On a bottling line, the operator probably counts bottles.
However, the line management might be more interested in the bottled volume, so not the number of bottles but the amount of liters or hectoliters. The OEE Coach has the possibility to use a second unit of measurement besides the regular one used to register produced output on a daily basis. This alternative unit to measure output is called the Equivalent value(s). Use this option in situations where plant management or departments calculate output in different units of measurement than the operators.
Example: If a factory uses bottles, barrels, and tanks as units of measurement on different machines, the equivalent value could be expressed in liters.
The next step is to define the equivalent output value for each type of output:
- 1 barrel = 50 liters
- 1 tank = 1000 liters
- 1 bottle X = 0,33 liters
In the machines master-table you can define what equivalent values will be used on the machine.
In the Machine – Activity – Product (MAP) master-table, per product that may be produced on a specific machine, you will define the ratio between the normally registered unit (e.g. 1 bottle X) and its equivalent unit (e.g. 33cl) If you would like to summarize the output of several (groups of) machines, make sure they all use the same equivalent value.
Below you see some examples for bottles with different content, connectors with different number of pins and boxes containing different quantities of cups.
How to use Equivalent values
- First decide per machine in what equivalent units you want to see the output on that machine.
- Then make sure that all the products that have been defined as potential output for this machine have the conversion factor defined in the output table (in MAP).
Example: If you want the bottles on a bottling machine be counted as bottles and in a summary you want to see how many liters have been bottled, use ‘Liters’ as equivalent value, choose ‘Bottles’ as unit in the machine’s master-table. In the MAP define for each product on that machine how much content each bottle carries.