OEE Calculation Parameters

[BeekeeperIRL]

Hi All,
I would like to capture OEE for a forming machine/process, yet since this subject is new to me, require some reassurance on the simple calculations..
I'm unsure of performance and availability classification, since the process varies cycle to cycle, requiring extended periods of heating and cleaning in-between..
Typical production based on 8hrs/480 mins are as follows:
14 Parts Produced
Total of 4hrs/240mins Heating Time
Total of 20mins Cleaning Time

Since Cleaning and Heating is part of the process, should my cycle time have that incorporated, thus not impacting > 50% availability?
But once the tool is clean and at enough Temperature forming time can be as quick as 15mins, between parts...

Basing it on a run rate of 15mins/part, 100% percent Quality and classifying heating and cleaning as downtime, results in 41.2% OEE.. Would this be the typical industry calculated approach? Or should a partial allowance of heating and cleaning time be incorporated into the cycle time, and excess impact availability?
Thank you,
Rob

 

[GregLocock]

That entirely depends on what on Earth you are up to. A brick kiln works on a several day cycle, some of the sorts of machines I know make thousands of parts per minute, and most work on one a minute.

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

 

[EdStainless]

When there are intermittent, start-up, or periodic components to the operation you need to select a time frame.
It needs to be long enough to give a realistic 'ongoing operation' picture while still accounting for the irregular function.

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P.E. Metallurgy, Plymouth Tube