John Day developed a proactive maintenance process in 1978 and manage maintenance and engineering at Alumax Mt. Holly and later at Alcoa Mt Holly for over 20 years. These are the slides he presented at the 1997 SMRP Conference. Great slides with great information. If you would like the slides and not PDF send me an email at firstname.lastname@example.org. I worked for John Day back in the early 1980s which started my journey in Proactive Maintenance.