Fig 2.: Values obtained from different market studies: Alimarket S.A and DBK Informa
To calculate the profitability of a maintenance contract, the costs of preventive maintenance and the costs of possible corrective maintenance must be analyzed. The best corrective maintenance is the one that is not done.
Figure 3 shows how the Gross Margin (GM) and the profit before interest, amortization, and depreciation (EBITDA) of each maintenance contract are calculated, which is the sum of the GM and EBITDA of each elevator. In the aforementioned figure an example is specified, based on the average market cost values ​​of a local or regional company, which are lower than the average cost values ​​of a multinational. Depending on each company and its market prices and operating costs, GM and EBITDA may vary.
Where Direct cost of sales is direct labor cost, which represents the salary, training, and social security cost of each maintenance Technician who intervenes in the service operation that must not exceed a certain maintenance time, which the average is approximately 60 minutes per each elevator. Where the tool cost is the prorate of the depreciation of each tool used for the operation, where the transport cost is the time the Technician travels to the location of the installation, including non-desirable times, and where the cost Corrective maintenance is the cost of any action that does not correspond to preventive maintenance.