Dr. Donald L. Keefer, age not given, passed away on May 28, 2019. Don graduated from Carnegie Tech (now Carnegie Mellon University) with a BS in Mechanical Engineering. He went on to earn masters degrees from Stanford and the University of Michigan and then acquired a PhD in Industrial Engineering from the University of Michigan. After gaining years of industrial experience at Gulf Oil and Chevron as a decision analyst, he served as a professor at ASU in the WP Carey School of Business, Supply Chain Management from 1987-2010. Upon his retirement, he was awarded emeritus status. He is survived by his wife, Beverly, two daughters, two grandchildren and a brother. A memorial service will be held to celebrate Don's life with his family and friends on Monday, June 3, 2019, at 2:00 p.m. at Tempe First United Methodist Church, 215 E. University Dr. Tempe. In lieu of flowers please consider donating to Hospice of the Valley or Habitat for Humanity.(Source: Arizona Republic)