Every man who has ever been in charge of the operation and maintenance of a plant that utilizes a large number of mechanical devices knows the value of a maintenance record system. All but the most rudimentary water treatment plants and pumping stations are sufficiently complicated to place the adequate performance of their maintenance functions beyond the capacity of human memory.
Techniques for Formalization of Maintenance Procedures
Authors: Dan P. Norris
1962 Journal AWWA Vol. 54, No. 8