In business terms, there may be no maintenance-related metric more important than Overall Equipment Effectiveness (OEE).
By accounting for availability, performance, and quality, OEE provides one of the quickest ways to assess the role of maintenance in the overall health of your company. Yet many companies either neglect to track it, or calculate it using incomplete/inaccurate data gathered using outdated paper records and spreadsheets.
World-class companies, by contrast, use CMMS solutions to track detailed information on their equipment and watch their OEE numbers carefully to target areas for improvement. These companies maintain upwards of 90% equipment availability, performance rates of 95% or more, and overall quality of 99% for an OEE greater than or equal to 85%.
So how do they achieve this level of excellence? First, let’s quickly review how OEE and each of its components are calculated:
Availability = Run Time/Total Time (accounts for Down Time losses)
Performance = Total Count/Target Counter (accounts for Speed losses)
Quality = Good Count/Total Count (accounts for Quality losses)
OEE = Availability x Performance x Quality
In order to put these calculations to proper use, world-class companies will define several specific timespans (work shifts, for instance) and calculate these OEE measures for each in order to compare them. In this week’s blog, we’ll focus on availability to see how you can drill into this metric and improve it.
Availability is the foundation of all OEE calculations because it is a straightforward measure of downtime. When it comes to improving OEE, availability is therefore the best place to start.
There are two key factors involved in availability: machine breakdowns and machine adjustments/setups.
CMMS solutions make it easy to track machine runtime in the form of logs that can be entered via smartphone, tablet, or PC. In ManagerPlus, the “Work Order Down Time” report shows the amount of time that a piece of equipment was inoperative.