Organizational and technological level of major repairs of buildings and structures

Introduction. Carrying out major repairs is one of the main activities for achieving the goals of long-term preservation and normal operation of buildings and structures. Basically, major repairs are connected with the same problems as construction. However, major repairs may include difficulties that are not typical for construction. Due to this, the topic of major repairs still remains very relevant in modern publications and not all aspects of its organizing have been studied well. The purpose of this study is to develop an evaluating model for determining the realization quality at organizational and technological stage of major repairs of buildings (structures). To achieve this goal the following tasks have been set: to identify problems arising in the field of organization and technology of major repairs; to detect the factors affecting the fulfillment of major repairs; to develop a formula for determining the quality of organizational and technological level in major repairs and to make proposals for its improvement. Materials and methods. Theory of multiple principles, method of expert assessments and mathematical statistics were applied in the study. To conduct the necessary experiments and analyze their results, the production resources of the Don State Technical University were used, as well as data from the number of customers of major repairs. Representatives of these customers, first of all, were involved as experts for assessing the organizational and technological level of contractors performing major repairs of buildings and structures. The quality level of major repair organization is most appropriately to be determined by three characteristics - quality, speed of execution, price. If the first two indicators are high, and the third is the lowest, it can be said that the level is the highest. To estimate more accurate the performance level of major repairs, it is necessary to take into account not only the value of the indicators of the factors, but also the values of the characteristics of these factors, as well as the significance of the indicators of these characteristics. Results. The study allowed to systematize organizational and technological problems of major repairs; to define the factors influencing the organizational and technological level of major repairs of buildings (structures); to propose a model for its determination; to identify the characteristics of the factors influencing it; to develop a formula for evaluating the organizational and technological level of major repairs; to propose an algorithm for estimation the general organizational and technological level of major repairs; to derive, using a practical example, the significance of the factors influencing the execution quality of major repairs; to give proposals for improving the organizational and technological level of major repairs. Discussion and conclusions. The practical value of the work for major repair customers is that, applying the proposed methodology, they can choose a contractor with a higher performance level, and contractors can improve their level using our methodology. Identification and systematization of problems in organizing major repairs by us can help all participants taking part in major repair relations in terms of neutralizing such problems at the early stages of preparing for major repairs. The obtained results of our practical survey were taken into account developing contractor activity plans, on the basis of which the research had been conducted. By developing the study, it will be possible to supplement the number of factors influencing the organizational and technological level of major repairs, as well as identify a range of other characteristics of these determinants and systematize the lists of factors and characteristics.