What is
Overall Equipment/Machine Efficiency (OEE):
OEE is the framework for measuring the efficiency and effectiveness of a process, by breaking it down into three constituent components (Availability, Performance and Quality product rate). It helps to measure a problem so that easily can fix it and provides a standardized method of benchmarking progress. OEE identifies the percentage of planned production time that is truly productive
OEE is the framework for measuring the efficiency and effectiveness of a process, by breaking it down into three constituent components (Availability, Performance and Quality product rate). It helps to measure a problem so that easily can fix it and provides a standardized method of benchmarking progress. OEE identifies the percentage of planned production time that is truly productive
Overall machine or equipment
efficiency is the how to performs machine versus spec. In practically,
OEE= Availability X Performance Rate X Quality Product Rate
Where,
Loading time – Down time
Availability = ………………………………………. X 100
Loading time
Standard cycle time x Processing quantity
Performance = …………………………………………………. x 100
Operating time
Processing quantity – Defective quantity
Quality product rate = ……………………………………………………………. X 100
Processing quantity
Let,
- Working hours per day: 10 hours x 60 min = 600 min
- Shut down (SD): 35 min
- Loading time: (600-35) = 565 min
- Equipment stoppage/ down time: (30+20+25) = 75
(a) Failure : 30 min
(b) Set up : 20 min
(c) Adjustment : 25 min
(b) Set up : 20 min
(c) Adjustment : 25 min
- Operating time : (565 - 75) = 490 min
- Standard Cycle time : 0.35 min/ pieces
- Processing quantity : 550 pieces/ day
- Defective : 30 pieces.
Now,
Loading time – Down time
Availability = ……………………………………………. X 100
Loading time
565 – 75
= ………………….. x 100
565
= 86.72%
Standard cycle time x Processing quantity
Performance = ………………………………………………….. x 100
Operating time
0.35 x 550
= ……………………. X 100
490
= 40.35%
Processing quantity – Defective quantity
Quality product rate = ……………………………………………………………………. X 100
Processing quantity
550 – 30
= …………….. x 100
550
= 94.54%
So, OEE = Availability X Performance Rate X Quality Product Rate
= 0.8672 X 0.4035 X 0.9454
= 33.08%
Loading time – Down time
Availability = ……………………………………………. X 100
Loading time
565 – 75
= ………………….. x 100
565
= 86.72%
Standard cycle time x Processing quantity
Performance = ………………………………………………….. x 100
Operating time
0.35 x 550
= ……………………. X 100
490
= 40.35%
Processing quantity – Defective quantity
Quality product rate = ……………………………………………………………………. X 100
Processing quantity
550 – 30
= …………….. x 100
550
= 94.54%
So, OEE = Availability X Performance Rate X Quality Product Rate
= 0.8672 X 0.4035 X 0.9454
= 33.08%
