Definition of overall equipment effectiveness? and OEE stands for Term initially used by Seiichi Nakajima in the year 1960 to measure how efficiently we are utilizing our equipment. Seiichi Nakajimn was a Japanese citizen and the inventor of total productive maintenance (TPM).
OEE cannot be a measurable number but it can be widely used to find the scope of improvement in a manufacturing process and identifies the scope to increase productivity with optimum resources.
Definition of overall equipment effectiveness
In several organizations, the Definition of overall equipment effectiveness is used as a key performance indicator (KPI) and to identify the various scope of success of lean manufacturing best practices.
OEE stands for Overall Equipment Efficiency (OEE), overall equipment effectiveness meaning is the best practice that is assigned for best improvement opportunities in manufacturing.
Definition of overall equipment effectiveness is a very simple metric to immediately indicate the status of a manufacturing process and providing a frame of improvement in the process. Now ques is that what is overall equipment effectiveness.
overall equipment effectiveness formula
OEE = Availability × Performance × Quality
Availability Rate: Availability rate is quantifying how much the production equipment is available to run for a value-added production process.
Availability can be calculated as the percentage of time the production equipment is ready to produce, working without any unplanned stoppage.
There are two factors responsible for Availability loss, first is unplanned stops such as equipment breakdown, material Shortage, and another one is planned stoppage like change over time, etc.
Availability Rate is calculated as machines’ planned runtime divided by planned Production Time.
Availability Rate = ((Total planned time – Total down times) / Total planned time) * 100
The calculation of equipment scheduled run time usually excludes the set planned time slot for preventive maintenance or breaks but it includes other downtime’s like setup adjustments, machine break down or material shortage, etc.
Performance Rate: Performance rate is the measure of the effectiveness of the process / Equipment to produce parts within defined cycle times. Performance loss considers all factors responsible for less run of the equipment at its maximum possible standard running speeds. Normally these factors are slower cycle time, Small unplanned stoppage, etc.
Performance rate = (Actual output product line / Ideal output to be delivered from the line based on cycle time in total available time) *100
Performance Rate = Actual Output/ Standard Output
The Standard output is the best fastest possible output rate produced on the equipment. The factors responsible for limiting the performance are mainly small stoppage, idling the equipment, or slow cycle time.
Quality Rate: Quality rate or First-time pass yield is the measure of Quality performance and it quantifies how robust the processes are to deliver consistent Quality Results.it is the ratio of good quality products compared to the total output rate.
Quality Rate (%) = (Units passed in first go/ Total units Produced) * 100
The factors responsible for quality loss are mainly the defective products that need to rework later not meeting the set quality standards.
The Benchmark of OEE is very important as it can be compared to the performance of used equipment from set standard industry parameters and applicable to similar assets using in-house operations.
So, considering overall equipment effectiveness meaning on how to evaluate the good and bad OEE score is very important to understand.
- A 100% score of An OEE is an ideal production. It means we are manufacturing defect-free products at full speed without any breakdown or stoppages.
- 85% score of an OEE can be considered as excellent manufacturing and can be considered as a long-term target of any organization.
- 60% score of An OEE can be considered as good but needs effort for improvements in the production system.
- 40% An OEE score can be considered as bad operation and need to restructure to improve productivity, cycle time, or defect rates.
Perfect production is called when production is done at full capacity without any time loss without losing any quality of the product. OEE stands for the overall equipment effectiveness formula.
- Production of all products with 100 % Quality score.
So Here you will get the answer of what is overall equipment effectiveness and one stands for, the definition of overall equipment effectiveness.