## 5 Conclusions  
The ability to absorb knowledge in an organization is a key element in implementing innovative solutions in material, information, and management flows. The ability to use knowledge gives the greatest possibility of using solutions falling within the scope of Logistics 4.0. Logistics 4.0 is a set of solutions striving to improve companies' performance and support Industry 4.0 concept implementation. These solutions are highly advanced and their implementation requires extensive knowledge and understanding. Thus, the implementation of contemporary solutions in the field of Logistics 4.0 requires that the organization first improve the absorption of knowledge. This ability is the ground on which an effective logistics system can be built using modern technical, technological, and organizational solutions.  
The research conducted was intended to be a pilot study to bring inspiration and structure for further research areas. Since the problem analyzed is broad and multi-dimensional, it requires deepened analysis. The authors intend to focus their further efforts on interdependencies between the dimensions of the maturity model (material flow, information flow, and management) in the context of the knowledge absorption level required to upgrade their maturity levels.  
Importantly, the research results confirmed that experts see the relationship between knowledge absorption levels and Logistics 4.0 maturity levels. Therefore, it is legitimate to conclude that both models can be used complementarily and should form the basis for planning activities under the  
Figure 4: Research results in management area (own study).  
implementation of detailed solutions (regarding changes in management, organization of material flows, and information flow). The identified dependency should also be taken into account when analyzing a company's strategic readiness for implementing the concept of Logistics 4.0, especially in the aspect of human resource management.  
The topic presented in the research is becoming more and more up-to-date due to the development of the 5G network, which gives the opportunity to create a widely, and publicly, available communication infrastructure for solutions included in Logistics 4.0. Thus, thanks to the development of 5G technology, the costs of implementing and using Logistics 4.0 solutions are reduced, which will probably contribute to their dissemination. Identifying the factors of the effective use of Logistics 4.0 tools resulting from the ability to absorb knowledge in an organization is becoming an important topic from the point of view of building sustainable enterprises and sustainable supply chains.  
The general conclusion from the research was that to reach a higher level of maturity, a higher level of knowledge absorption is required. However, searching for differences in absorption of solutions within material flows, information flows, and managerial methods seems to be an interesting issue and promising field for further research.  
Conceptualization, A.S. and L.H.; methodology, L.H. and M.A.; formal analysis, P.C.; investigation, M.A.; resources, A.S. and R.D.; writing, original draft preparation, M.A.; writing, review and editing, A.S.; supervision, L.H.; funding acquisition, L.H.  
This research was funded by the Poznan University of Technology, Faculty of Engineering Management, Project Number 11/140/SBAD/4168.  
The authors declare no conflicts of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.