Calculating Overall Equipment Effectiveness
Optimising production line performance is a key ingredient to operating a food manufacturing facility that is both lean and profitable.
But how can you accurately assess the effectiveness of your equipment and what level of output should you be aiming for?
The answer is OEE, or ‘Overall Equipment Effectiveness’.
This global, best-practice measurement calculates the actual output of a production line as a percentage of its maximum potential output and is measured by using the following formula;
How do I calculate availability?
AVAILABILITY = ACTUAL OPERATING TIME / PLANNED PRODUCTION TIME X 100
Availability is actual operating time as a percentage of planned production time.
Take your planned production time (shift length minus planned breaks for lunch, maintenance and cleaning, and so on) and deduct any unplanned breaks (such as breakdowns).
How do I calculate performance?
PERFORMANCE = ACTUAL LINE SPEED / IDEAL LINE SPEED x 100
To calculate performance, you’ll need to know your actual line speed (the number of packs produced each minute), and your ideal line speed (the number of packs you should be producing each minute).
How do I calculate quality?
QUALITY = GOOD PACKS / ACTUAL PACKS x 100
Take the total number of packs made and work out how many of those met your quality standards (were fit for sale).
What percentage should I be aiming for?
World-class OEE is around 82%, but this no mean feat. The average manufacturing facility will achieve more like 60%, leaving considerable room for improvement.
Did you know that Ishida’s food packaging solutions deliver an OEE of 85% or higher as standard? Purchasing more efficient equipment isn’t always a viable route to operational efficiency, but when the time does come to replace key bits of equipment, making guaranteed OEE part of your specification criteria is a major step in the right direction.
Is there anything I should bear in mind when improving operational efficiencies?
Yes. It’s important to remember that OEE is a great indicator of performance, but it isn’t the only measure. Any improvements in operational efficiency will be more sustainable if OEE is used in conjunction with other measurements such as giveaway.
Remember, making positive changes in one aspect of production can have a negative impact elsewhere in the line. Increasing line speeds, for example, could lead to quality issues.
To discover more about how we could support you in achieving world-class OEE, drop us a line on email@example.com or to find out more about the results our solutions are achieveing for customers worldwide, check out our customer success stories.