Contents I. Introduction
In the modern market, consumer requirements must be satisfied based on high quality innovative products and technologies in order to ensure environmental safety, social security and growth in the well-being of society.[2] The structural transition to industrial development based on knowledge-intensive, high-tech, resource-saving industries is currently fully consistent with the principles and approaches to the sustainable development of high-tech industrial enterprises.[5] For the consumer, it is important to have a multifunctional service that provides high quality engineering services as part of after-sales service for innovations with a long service life.[3] Therefore, one of the urgent tasks of modern business is not only to improve the quality of services, but also to diversify these services, as well as to ensure the conditions for their most convenient provision to customers in order to meet their needs for after-sales service of product innovations purchased from the enterprise. [1]
