Overall Equipment Effectiveness (OEE)
The Overall Equipment Effectiveness is a key figure for a workplace. This key performance index (KPI) is made up of three factors.
The availability factor takes into account all periods of time that result in no production. This can be divided into two groups.
On the one hand, planned downtimes are avoidable framework conditions, which are however planed in advance. This is usually done because of administrative requirements and is not determined by the production. This includes shifts at unfavorable times (e.g. public holidays) in which no production is scheduled. This way, possible shift allowances can be avoided. At the same time, maintenance intervals can be scheduled with our Total Productive Maintenance module for cleaning or lubrication work.
However, unplanned downtimes have a negative impact on the key figure. Thus a production failure based on a defect must be avoided in any case. Production downtimes due to a lack of personnel or materials are also to be avoided.
Consequently, after the subtraction of the two time groups, the pure production time remains.
This performance factor is the comparison between the target quantity and the production quantity achieved.
For this, only the production time still available is considered as the basis for the specified quantity with the corresponding time specification per part (the cycle time).
This key performance indicator can also be over 100%, since the cycle time must be adjusted as the basis for this key indicator. The qualifications and experience of your staff also have a great influence.
The focus of this quality factor is the production quantity produced compared to the usable production quantity. This factor has a particularly significant impact on your profit. If this value drops below 100%, you will lose raw material, personnel and machine time as well as energy.
These three factors lead to the Overall Equipment Effectiveness (OEE).
If this value has dropped over a period of time, one has to consider in detail the most influential factor that has dropped.
This is a basis for the Continuous Improvement Process (CIP). Because you can quickly check whether the key figures improve - i.e. measure the success of a decision made.
At the same time, the quality of your products is constantly improving.
In this way you increase the added value of your workplaces sustainably.