Abstract
The country's largest vending machine operators and distributors were faced with the problem of evaluating manpower requirements and structure for the repair and maintenance work force, and of deciding where additions to this force should be located. This paper describes the formulation and application of a solution to the problem which has had beneficial effects far beyond the scope originally envisaged.The work force concerned operates a breakdown repair service which requires random journeys within each individual's prescribed area. The developed model evaluates the work content, and thus manpower requirements, of a region based on the number of machines, the breakdown rates, the repair times and the journey time. The travel component is automatically adjusted for growth in the work force.Analysis of the model's sensitivity to the key factors and the development of the relationship between utilisation and service level have enabled the company to improve service performance by 15% while also achieving a 67% increase in productivity.
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