![S&OP Book cover](https://blogs.sas.com/content/forecasting/files/2017/08/SOP-Gray-221.jpg)
Chris Gray of Gray Research is a longtime contributor to the practice of Sales and Operations Planning. He is author of several books on S&OP, software selection, and other supply chain related areas, including Sales and Operations Planning Standard System (2007). In 2006 he co-authored Sales & Operations Planning –