Methods to ENTER OUTPUT data
With most equipment, the produced amount of Outputs can easily be determined; for example, by reading a meter or by just counting the number of items.
With other equipment, an intermediate calculation has to be made, for example, by subtracting two counters (first counter – last counter = quantity) or by multiplying the length and the width to arrive at square meters.
Define the calculation method for the machine. The table below describes the available options in the OEE Coach.
In the Machine Definition screen, when selecting the type of calculation, the options below can be set:
|Single Piece||This is the default method. The output is the number or items counted directly, without any calculation.|
|Counter||Two counter readings are entered. The difference between them equals the output. |
– Start 100
– End 150
– Result 50
– Start 150
– End 100
– Result 50
Counter is the default measuring method when machine is set to Automatic data collection
|Square||Output is determined by multiplying the length and width of the Output. |
[Entered length 2] x [Entered width 3] = [Result 6]
|Cubical||Output is determined by the multiplying the length, width and height of the Output. |
[Entered length 2] x [entered width 3] x [entered height 4] = [Result 24]
|Input – Output **||A certain amount of items enters the machine and a certain amount exits the machine. What does NOT exit is considered scrap. Entered IN 200 Entered OUT 150 Result: Good 150 Scrap 50|
|Calendering **||Output is determined by multiplying the mass density (Specific Gravity) with thickness, width and speed. Entered SG 0,8 gr x entered thickness 0,4 mm x entered width 2000 result 640gr|
|Manual Operation **||In lines with major manual activities (e.g. paint shops) the theoretical output is calculated depending upon the amount of operators involved. The target production is calculated as Operators x Standard x Production time.|
OEE Calculation for ‘Manual Operations’
(This is an optional feature, not included in the standard release)
In assembly lines, disassembly lines and equipment with major manual activities (e.g. paint shops) the theoretical output depends strongly upon the amount of operators involved. If one operator can make 2 parts per minute, 3 operators could make 6 parts. In other words: the standard for a product(group) fluctuates proportional with the amount of operators involved. The OEE Coach has a setting for this special type of calculation, called [Manual Operation] to handle such situations.
The target production is calculated as
Operators x Standard x Production time.
In situations where the capacity increases proportionally with the amount of operators (manual operations), the OEE will stay the same regardless the amount of operators; assuming non-fluctuating performance.
Adding operators might result in higher output, but lower OEE. This would be an indicator for lost effectiveness, e.g. due to decreased working conditions (‘stepping on each shoes’). OEE could also increase when decreasing operators. In both situations communication patterns, workflow, cell-structure and workplace organization should be carefully reviewed.