|There could be a number of varying conditions for the same equipment. Consider if you had fleet in differing environments, does it reflect on the PM task? Or should the task list be made to suit the environment? Vehicle usage is another factor to consider. Think about the wear and tear on a Suburban in an urban environment that may be used by a building inspector or by emergency first-responders. One might drive the car sedately while the other is always on the way to a fire or some other catastrophe. Because of all the different ways people use vehicles, maintenance needs vary. The vehicle might need more frequent checks and services. Each environment and kind of service places different stress on the machine.