
Downtime is a period during which an equipment or machine is not functional or cannot work. It may be due to technical failure, machine adjustment, maintenance, or non-availability of inputs such as materials, labor or power. Average downtime is usually built into the price of goods produced, to recover its cost from the sales revenue. Downtime plays a significant role in a company's OEE.
Put simply, overall equipment effectiveness (OEE) is a measure of what you actually made, in comparison to what you could have made (in theory) over that time frame. The difference between the ideal and actual situation is due to losses. These losses can be categorized into various metrics that provide you with excellent data to enable you to target that specific area and help you improve.
OEE is calculated by measuring performance in the categories of Availability, Performance and Quality, and then multiplying the results. To see an example of an OEE calculation,
In an ideal environment, all equipment would operate all the time at full capacity producing good quality product. In real life, however, this situation is almost non-existent.
Real-time exchange of information between manufacturing and the rest of your company is critical for making business decisions that improve responsiveness, increase productivity, reduce costs and assure regulatory compliance.
By itself, OEE only provides data about manufacturing process. But, synchronizing plant and enterprise systems creates the groundwork for a real-time enterprise that can adapt to changing demands quickly and resourcefully. The result is manufacturing visibility –a powerful agent for innovation and performance advancement.
Industrial Network Systems’ MIGroup has a proven track record synchronizing production and enterprise systems to drive bottom line results across varying industries, from Food/Beverage and CPG, to Industrial and Pharmaceuticals.
Companies that use OEE as a metric have found success when combining it with general lean manufacturing programs and also as part of TPM systems. When using OEE with these systems the benefits become significant: