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The article considers the main methods for increasing the efficiency of aviation maintenance and repair (MRO) processes organization. A brief overview of these methodologies is presented and their key principles are highlighted. Based on the analysis of existing methodologies, a management decision-making technique based on the Stage-Gate project management technology and simulation modeling methods was proposed. This technique makes it possible to ensure the information availability for the after-sales services organization from other processes in a single information environment and make decisions on the transition to the next gate based on simulation models of aircraft maintenance at various gates.

Experimental study of strength of glued connections where repair mixtures Diagum FL, Diagum Р and Diaflex are used is shown. Suggestions of each repair mixture use are given. Obtained results provide developing of durable and economical technical solutions: shear shock absorbers, elastic couplings, elastic shafts with high energy intensity which in some cases allow to avoid failures of metallurgical equipment under dynamic loading. In addition, use of repair mixtures with elastomers helps to make durable coatings of steel surfaces.

This paper presents the results of research in the field of developing innovation projects on the basis of the identification of factors of competitiveness. The principles of formation of competitiveness, including the principle of systematicity, goal-setting, efficiency, adaptability, uncertainty, and innovativeness, are substantiated. A model for the development of a competitive innovation project based on an analysis of external and internal factors providing competitive advantages is proposed. As a result of the research, an integral index of competitiveness of innovation projects was formed, characterizing the level of innovation achieved and allowing substantiating the directions for further development of investment and construction projects.

The paper is devoted to the study of the working mechanisms of construction machines from the point of view of the selection of structural steels for the manufacture of welded metal structures. Special attention is paid to the operational reliability and durability of modern construction machines. It was found that the most suitable for the manufacture of welded structures are complex-alloyed low-carbon steels. They have high strength (σ0.2≥600 MPa, σB≥800 MPa), are characterized by sufficient plasticity and increased resistance to brittle fracture at low temperatures. In the selection process, special attention was paid to the properties that structural steels should simultaneously have, specifically: low sensitivity to various stress concentrators; adaptability to perform service functions that are envisaged in the development of the project and directly in the process of manufacturing the welded metal structure, good weldability. The experiments were carried out using the example of low-carbon and low-alloy steels. Special attention was paid to the analysis of the optimal modes of thermal cycling with the aim of obtaining final structures with a given degree of dispersion, typical of real metal structures. Taking into account the requirements for the reliability of construction machines in operating conditions at high and low temperatures, as well as taking into account various operational characteristics, the expediency of using ferromagnetic structural steels was substantiated.