What is OEE (Overall Equipment Effectiveness)?

What is mean by OEE? (Overall Equipment Effectiveness)

Availability Performance Quality

What is Availability?

What is Performance?

What is Quality Rate in OEE?

How to calculate OEE?

Times and Losses Calculation:

OEE Calculation Example:

OEE Benefits:

→ OEE (Overall Equipment Effectiveness) is an index to judge production run in terms of machine availability, production rate & quality rate of the product.→ For TPM (Total Productive Maintenance) and, OEE is a key metric.→ It is an important characteristic of capacity planning, material planning, and other resource planning.→ OEE is also known as TEEP (Total effective equipment performance).→ Overall Equipment Effectiveness is a→ There are three parameters for Overall Equipment Effectiveness) monitoring→ Availability shows the machine available duration for manufacturing.→ In other words, for how much time our machine is available for manufacturing.→ Availability takes into account of Breakdown Losses.→ Downtime losses include events or incidents that lead to a stoppage of planned production for a considerable duration.→ After removing, downtime we can get the operating duration of the machine.➨ Examples of Downtime:⇢ Equipment failure,⇢ Material shortage,⇢ Excess change over timing, etc...→ Performance shows the excess time taken for manufacturing as compared to standard operating timing.→ The performance takes into account of Speed Losses.→ The Speed Losses includes any factor that leads to operating production with more cycle time than maximum permissible.➨ Examples of performance losses:⇢ Low speed of job loading/unloading,⇢ Fatigue of the operator,⇢ Excess cycle time in manual work, etc...→ Quality shows the→ It takes into account the losses (loss due to the manufacturing of a bad part).→ Quality loss can only be present due to the manufacturing of a defective part or non-conforming part.➨ OEE_Calculation is mentioned in the below picture.→ Planned Shutdown – Not part of Overall Equipment Effectiveness Calculation.→ Break Down Loss - Operating timing to Planned Manufacturing timing ratio is called availability when a process runs without any stoppage there will be 100% availability.→ Speed Loss – It is the ratio of net operating timing to total operating timing or it can be calculated by actual cycle time / ideal cycle time. When the process runs with maximum theoretical speed then performance will be 100%.→ Quality Loss- it is the ratio of total good parts to a total part produced. When all produced parts are good then there will be 100% quality.→ Let’s assume below data to understand Overall Equipment Effectiveness calculation→ Shift Duration = 8 Hours (480 Minutes)→ Total Breaks = 55 Minutes→ Break Down = 40 Minutes→ Ideal Production Rate = 1 Part per Minute→ Total Part Produced = 350→ Rejected Parts = 4➨ Planned Production duration = Total Available Time – Planned Breaks= 480 Minutes – 55 Minutes= 425 Minutes➨ Actual Production duration = Planned Production duration – stops (breakdowns)= 425 Minutes – 40 Minutes= 385 Minutes➨ Availability (A) = Actual Prod. Time/Planned Prod. Time= 385/425 Minutes= 0.905➨ Actual Production Rate = Total Count/Total Run Timing= 350/385= 0.909➨ Performance (P) = Actual Production Rate/Ideal Production Rate= 0.909/1.0= 0.909➨ Quality (Q) = Good Parts/Total Parts Produced= (350-4)/350= 0.988➨ OEE = Availability (A) x Performance (P) x Quality (Q)= 0.905 x 0.909 x 0.988= 0.812 ~ 81.2 %→ It helps us to set goals for improvement, and track the progress.→ Overall Equipment Effectiveness helps us to find inefficiencies in the operation process.→ It Provides us a benchmark data for the new process setup.→ Overall Equipment Effectiveness helps to track progress infrom an operation process.