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Look at the following OEE data for two sequential weeks. A single number that captures how well you are doing (OEE) and three numbers that capture the fundamental nature of your losses (Availability, Performance, and Quality). In the preferred calculation, you get the best of both worlds. Note: If you use both a format applied with the TEXT function and apply a number format to the cell, the TEXT function takes precedence over the cell formatting. This is the role of Availability, Performance, and Quality. TEXT (B2-A2,'h:mm:ss') Hours, minutes, and seconds between two times with the cell formatted as 'h:mm:ss' by using the TEXT function (4:55:00). What your OEE score doesn’t provide is any insights as to the underlying causes of lost productivity. And it makes it easy to track improvements in that process over time. OEE scores provide very valuable insight – an accurate picture of how effectively your manufacturing process is running. And, as described earlier, multiplying Good Count by Ideal Cycle Time results in Fully Productive Time (manufacturing only Good Parts as fast as possible, with no Stop Time). This is the “simplest” OEE calculation described earlier. OEE = (Good Count × Ideal Cycle Time) / Planned Production Time