The optimization value of maintenance facilities in order to ensure the effective development of the company is grounded. Conceptual bases of the effective management of the maintenance and replacement of fixed assets are considered in the article. The importance to ensure the competitiveness of products with the aim to prevent lowering of product quality is determined. The necessity of a high level of discipline of statistical observations to ensure forecasting objectivity of technical condition of fixed assets is grounded. To solve the task of increasing the efficiency of maintenance and replacement of equipment the usage of statistical and simulation approaches is offered. In order to find the optimal time between maintenance (replacement parts), that will minimize costs, the model of expected failures is applied. The model is based on the time interval and the average cost of replacement parts. The use of simulation approach has allowed building of a model of replacement equipment or parts on the basis of continuous probability distribution of breakdowns occurrence. The proposals for the optimal length of time to review and eliminate breakdowns of equipment have become the results of developed models testing.