Let’s explain this through a couple of examples. First let’s imagine that we have a rooftop chiller which needs to be maintained on a yearly basis. It will also need an overhaul every 3 years and needs to be replaced in 20 years. For the yearly maintenance a company might want to establish a rigorous maintenance program where all the steps are planned and processes are defined for such maintenance . We call this “procedural” preventive maintenance. In the case of major overhaul and replacement, the company may depend on the expertise of an outside contractor to analyze, propose and…




