Reliable Plant Online reprised one of their earlier articles, Why Trending is important to PdM. The author, Mark Latino, gave a case study describing how a machine maintenance technician used data trending to convince his supervisors that a machine needed predictive maintenance intervention. I have looked at carrying this process a step further using SPC methods to provide us the signal alerts for preventative maintenance. The presentation was, “Integrating Preventative Maintenance Into HACCP” which I presentated at the2005 IFT (Intitute of Food Technologists) Annual Conference. A write-up based on the presentation is available on the NWA website as: Using SPC methods to trigger preventative maintenance and prevent CCP violations .