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The present study reports the results of simulating the customer transaction costs in e-commerce. In this investigation, we have focused our attention to influence of introduction of the collective product delivery routes and the level of consumer conversion rate on the customer transaction costs in e-commerce. The simulation of customer transaction costs in e-commerce show that they can be significantly reduced by optimizing the delivery routes and increasing conversion rates. A reduction of the customer transaction costs in comparison with individual delivery costs is connected with taking into account in calculation introduction of collective delivery routes. It was found the that reduction of customer transaction costs involves an optimizing the collective routes of goods delivery. The reason for this can be attributed to the fact that the increasing the number of delivery addresses per route can result in a lower delivery costs for per buyer. The maximal effect is observed for central city zone, where it is possible to carry out an effective territorial combination of the addresses of buyers in the delivery route.

In this article, the computational simulation of the workflow in the primary combustion chamber flame tube of the afterburning turbofan jet engine (ATJE) on the tactical military aircraft was carried out. The geometric model of a flame tube was created and adapted to perform the interrelated calculation of the thermal and stress-strain behaviour of the walls of the flame tube influenced by the operational loads during the computational simulation of the workflow. Quantitative and qualitative analysis of the simulation results was conducted, and the connection between the peculiarities of the workflow and the characteristic damage of the flame tubes, detected during the operation, was established. The possibility of using modern CAD/CAE systems to solve the scientific tasks towards maximizing the cycle life potential of the main and primarily important components of the ATJE on the assessment basis of their damage exhaustion degree was determined.