Statistics is a collection of that can be used to describe and structure anything on the planet. Mean can be calculated by simply adding all the readings and dividing it by the number of the readings. The calculation of mean is very useful and helps in determining maintenance function effectiveness. Another important calculation is Standard Deviation, which is related to the mean. It helps to measure the variability of the measurements and it becomes increasingly important, as the variability of the readings gets larger. The Normal Curve helps you to identify ‘Bad actors’ in your buildings, equipments and fleet. It helps in allocation of your resources.