OEE or Overall Equipment Effectiveness measures manufacturing performance against perfection. It is regarded as the global benchmark for measuring manufacturing efficiency. Any deviation from perfection drives up operating cost. OEE looks at three different losses and multiplies them across to assess total losses. Those losses are:
Availability - This is a measure of downtime (both planned and unplanned)
Throughput - This measures rate loss against the theoretical maximum run rate
Yield - This measures the amount of efficiency lost due to quality issues
Each of these factors has a cost impact. There are measurable financial and other costs associated with having people at work, the lights on, and machines operating. Anytime these things are happening and you aren't producing at theoretical maximum levels, you are suffering efficiency and financial losses. Most factories are operating at or below 60% OEE but have no idea. Additionally, most factories do not measure productivity, and many who do, use methods that exclude significant losses such as changeover times, start-ups, throughput loss and many others. Again, anytime you have people on the clock and product yet to be made, anything less than the theoretical max output is a loss...for whatever reason - controllable or uncontrollable. At the end of the day, all aspects of running your business are controllable; the only real question is: are you willing to do what it takes to "fix" something that is perceived as "uncontrollable". I've worked with manufacturers who, for years, wrote off "bad raw material" as uncontrollable but have never talked with the supplier about fixing the problem or investigated sourcing with other suppliers. In almost all cases, uncontrollable is synonymous for "we don't want to deal with it".
For a factory with a direct operating cost of $10M annually and an OEE of 60%, the total efficiency losses are 40%. Therefore 40% of the direct operating costs are also losses, or $4M in this case. At 100% efficiency, the operating cost would be $6M.
World-class execution is 85% OEE, which equates to a direct operating cost of $8.5M in the example above. For the same factory, there is a $2.5M savings opportunity for improving from 60% to 85% OEE. What would you do with an extra $2.5M dollars per year? Expand production? Pay bonuses? Acquire a new business? Buy a small yacht and sail around the world?
Achieving 85% OEE is challenging but attainable for the vast majority of manufacturers. Click the link below to receive a free report on how much savings opportunity you might have based on your direct operating costs and efficiency performance:
If you don't know your OEE, create a free fOS account at factoryoperatingsystem.com and start inputting your production run data (takes less than a minute per run). It will help you track OEE by product, line, shift, team, and even individual. It's a great tool for highlighting exactly where to focus improvement efforts. For the sake of the tool mentioned in the above link, input 60% as a reference point and see what you get for a savings opportunity if you're unsure of your current OEE.