Smiley Frowney Percent Published on July 26, 2016 in Good and Bad Ways to Calculate the OEEFull resolution (955 × 885) Smiley Frowney Percent Illustration of good and bay ways to calculate an OEE through a percentage sign with smiley and frowneys. This work by Christoph Roser at AllAboutLean.com is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. Please credit the image as shown below. For digital documents and web pages please do include the links as shown below. Thank you.By Christoph Roser at AllAboutLean.com under the free CC-BY-SA 4.0 license.