OEE - Overall Equipment Effectiveness

English

The OEE (Overall Equipment Effectiveness) is a percentage used to determine the production efficiency of industrial machinery.

The advantage of the OEE over other ratios is that quantified in a single flag all key parameters of industrial production: the availability, efficiency and quality.

For an industry, have an OEE for example 75%, it means that for every 100 pieces good that the machine could have produced, there have been only 75.

Based on an analysis of the three components that make up the OEE, it is possible to know whether what's missing for 100%, has been lost by the unavailability (there has been during the time it should be producing), the low efficiency (there has been the speed with which it could have done), or non-quality (there has been with the quality needed to be done).

Conceptually, the OEE is the result of the product of three factors:

OEE = Availability x Performance x Quality

Today, the OEE has become an international standard, recognized by major industries around the world.

RANKING
The value of OEE allows classify one or more lines, including an entire plant, over other considered excellent, and gives an idea of what are the factors to improve to climb positions in this classification.

OEE	Qualification	Consequences
<65%	Unacceptable	The company produces significant economic losses. Very low competitiveness
≥65% <75%	Fair	Acceptable only if it is in the process of improvement. Economic losses. Low competitiveness
≥75% <85%	Acceptable	Continuing improvement to overcome the 85% and move towards World Class. Light economic losses. Competitiveness slightly low
≥85% <95%	Good	Entering in World Class Values. Good competitiveness
≥95%	Excellence	World Class Values. Excellent competitiveness

The OEE is the best measure available that allows us to discover and pursue the path of the optimization of manufacturing processes and is directly related to the cost of operation. The OEE metrics reports on the losses and bottlenecks in the process and ties making decisions of a financial nature with the performance of factory operations, since it allows justify any decision on new investments. In addition, the forecast annual improvement in the OEE index allows estimating staffing requirements, materials, equipment, services, etc. in annual planning. Finally, the OEE is the pattern that responds to the requirements of quality and continuous improvement required by the ISO 9000 certification.

The OEE considers six cases of losses in the production process:

1	Equipment failure	Availability
2	Set-up and adjustment	Availability
3	Idling and minor stops	Performance
4	Reduced speed	Performance
5	Defects in process	Quality
6	Start up losses	Quality

Quantification of the losses causes in the production process

oee - Valoració dels temps en el procés de producció