How to calculate OEE (Overall Equipment Effectiveness)
Step 1: Check how much time you had to produce.
This is your Planned Production Time (Your Shift is 8 hour = 480 Minutes)
Step 2: Subtract any Downtime.
If the machine was down for repairs or setup, subtract that from the total time.
Example:
480 minutes 60 minutes of downtime =
420 minutes of actual running hour.
Step 3: See how fast your machine should be running.
Ask: How many parts should it make in perfect conditions?
Example: If it makes 1 part per minute, in 420 minutes it should make 420 parts.
Step 4: Check how many parts it actually made.
Maybe it made 380 parts instead of 420. So, it Wasn't running at full speed.
Step 5: Check how many of those parts were good.
If only 360 out of 380 were good, then some were defective.
Step 6: Now think about this.
You had time to make 480 perfect parts.
But you only made 360 good ones.
So, your effectiveness is 360 out of 480. That's your ΟΕΕ.
