The article constitutes the second part of the study, the aim of which is to present the influence of the COVID-19 pandemic on logistics on the example of selected Polish manufacturing, trade and service enterprises. It includes an in-depth analysis of the results of the author's own empirical research. The results of own empirical research presented in the study constitute the effects of more extensive research on an in-depth analysis of the logistics process management in Polish manufacturing, trade and service enterprises in 2019–2021 in the context of shaping enterprise results. The research was conducted in 2022 among 335 randomly selected small, medium and large Polish manufacturing, trade and service enterprises. As a result of the research, it was found that the COVID-19 pandemic had a huge influence on logistics in all surveyed enterprises in 2020–2021. Changes in logistics conditions caused by the pandemic overlapped with the logistics determinants of contemporary enterprises before the pandemic. Strategic and operational management of logistics processes increasingly determined the economic and market results of the best surveyed enterprises during the COVID-19 pandemic. Enterprises achieving the best results during the pandemic implemented the supply chain management strategy that was in a constant state of creation and development, characterized by an immediate response to changing customer requirements, environmental conditions and competitors' activities, respecting, at the same time, the principles of sustainable development. During the pandemic, the most effective logistics managers took quick actions so as to reduce the likelihood of disruption, decrease the severity of the effects of events, and create and maintain competitive advantages of their enterprises. 

The article constitutes the first part of the study, the aim of which is to present the influence of the COVID-19 pandemic on logistics on the example of selected Polish manufacturing, trade and service enterprises. The article is based on the study of literature and own empirical research. The research was conducted in 2022 among 335 randomly selected small, medium and large Polish manufacturing, trade and service enterprises. As a result of the research, it was found that the COVID-19 pandemic had a huge influence on logistics in all surveyed enterprises in 2020–2021. Changes in logistics conditions caused by the pandemic overlapped with the logistics determinants of contemporary enterprises before the pandemic. Strategic and operational management of logistics processes increasingly determined the economic and market results of the best surveyed enterprises during the COVID-19 pandemic. Enterprises achieving the best results during the pandemic implemented the supply chain management strategy that was in a constant state of creation and development, characterized by an immediate response to changing customer requirements, environmental conditions and competitors' activities, respecting, at the same time, the principles of sustainable development. During the pandemic, the most effective logistics managers took quick actions so as to reduce the likelihood of disruption, decrease the severity of the effects of events, and create and maintain competitive advantages of their enterprises.

The article constitutes the second part of the study which aim is to present changes in supply chain management before the COVID-19 pandemic and in the first months of this pandemic as well as to assess the influence of these changes on building a competitive advantage on the example of the selected Polish production, trade and service enterprises. It attempts to carry out an in-depth analysis of the most important, in the opinion of the author, aspects of changes in supply chain management of the selected Polish production, trade and service enterprises in 2018–2020 and to assess the influence of these changes on the process of building a competitive advantage of the surveyed companies.

The article constitutes the first part of the study which aim is to present changes in supply chain management before the COVID-19 pandemic and in the first months of this pandemic as well as to assess the influence of these changes on building a competitive advantage on the example of the selected Polish production, trade and service enterprises. It presents the essence and directions of managing contemporary supply chains. The research methodology has been described and a short description of the examined population has been made. The results of the research concerning selected conditions for managing logistics processes in the surveyed enterprises in 2018–2020 have been presented.

The article constitutes the second part of the study, the purpose of which is to represent the influence of logistics on competitiveness of a service company in contemporary conditions on the example of selected service enterprises. In the article, the author attempted to conduct an in-depth analysis of logistics systems and logistics process management in the surveyed service enterprises in the context of building the enterprise's competitiveness and assessing the influence of logistics on the competitiveness of the surveyed enterprises.

The article constitutes the first part of the study, the purpose of which is to represent the influence of logistics on competitiveness of a service company in contemporary conditions on the example of selected service enterprises. On the basis of the literature studies, the process of building the competitiveness of a service enterprise and the influence of logistics on the competitiveness of contemporary service enterprises has been presented. The research methodology has been described and a short description of the examined population has been made. The results of the research on selected aspects of logistics conditions in the management of the surveyed enterprises have been presented.