A survey questionnaire, directed to determining the management of the maintenance force, was mailed to 4,104 nation-wide companies. Of the 669 responses, 623 were sufficiently complete to use in the study. The survey data are presented in the form of charts and tables, grouping the companies by the type of manufacturing reported. Each data table is prefaced by a discussion of the factors relating to the ratio and is followed by a brief analysis of findings. The participating companies are profiled. Data are then presented on the number of total plant employees per maintenance hourly employee. The number of maintenance hourly employees are presented per maintenance supervisor, per maintenance planner, per special technician, per industrial engineer, per stores employee, and per maintenance staff employee. Data are also presented on: the type of maintenance work planned, maintenance hours planned, extent of outside contracting of maintenance work, the length of training programs, the extent of use of special technicians and industrial engineers, how maintenance work is measured, the value of the facility and equipment maintained, the use of electronic data processing in maintenance, and the use of financial incentives for maintenance personnel. Brief conclusions are drawn from the data. (AG)