**6. Conclusions**

Responding to the importance of the pursuit of sustainable development in modern society, it can be stated that an increasing number of organizations are striving to develop in a green direction. Therefore, a tool applicable to organizations with different fields of activity (energy, manufacturing, services, etc.) is needed to help organizations to assess the current situation in terms of greenness and determine directions for development. In this research, the aspect of the greenness of an organization's performance refers to an integration of green initiatives and practices into day-to-day activities aiming to meet its objectives of environmental, social well-being, and economic growth. It can be stated that it is appropriate to create a green organization benchmark against which organizations can assess their current level of greenness and identify areas for improvement. When creating such a benchmark, one of the important tasks is to determine the most suitable approach to evaluating an organization's performance. Thus, this research aimed to choose the most suitable approach for developing a benchmark by examining the methods for evaluating an organization's performance in terms of greenness.

After the analysis of the scientific literature, the essential attributes were defined, on the basis of which the suitability of the organization's performance evaluation approaches can be analyzed for the creation of a green organization benchmark: adaptability, complexity, and measurability. After systematizing the results of the methods analysis for evaluating an organization's performance, the three approaches suitable for the creation of a green organization benchmark were selected: resources of an organization, value chain, and management functions. It was determined that the most suitable approach to creating a green organization benchmark is the approach of resources of an organization, as this approach corresponds to the attributes of adaptability and measurability more than the other identified approaches. However, when applying the approach of resources of an organization to the creation of a green organization benchmark, it is important to consider that this approach does not include the impact of factors of the external environment. Therefore, when creating a green organization benchmark for evaluating an organization's performance on the basis of the approach of resources of an organization, it is reasonable to supplement this approach with an evaluation of factors of the external environment to address the attribute of complexity.

The strengths of this research can be defined by its relevance, novelty, and originality. The topic of the research is relevant according to nowadays actualities as the emergence of

green organizations and their further development is considered one of the measures to achieve the Sustainable Development Goals. The research was conducted aiming to fill the gap in the scientific research that there is still a lack of definition of what kind of organization is considered green. The novelty of the research is defined by the decision of the authors to analyze the aspect of the greenness of an organization in terms of its performance evaluation. The originality of this research can be defined by chosen attitude to analyze the topic from different perspectives combining different research methods (systematic and comparative analysis of scientific literature and strategic documents, content analysis, grouping, synthesis) in several stages in order to identify the most suitable approach for evaluating an organization's performance in the aspect of greenness. The limitation of this research is that the Web of Science database was chosen as a basis for the search for documents on the topic. Therefore, the results of the analysis would not be comprehensive enough. However, the content analysis provided in this review paper resulted in the choice of the most suitable approach for evaluating an organization's performance for the creation of a green organization benchmark, so the purpose of the research should be considered reached.

To sum up, the essential results of this research could be described as follows. First of all, the authors suggested analyzing the aspect of the greenness of an organization in terms of its performance evaluation, which could be considered a new perspective to study the topic of a green organization. Secondly, essential attributes were defined by the authors, on the basis of which the suitability of the organization's performance evaluation approaches can be analyzed: adaptability, complexity, and measurability. In addition, the authors identified three possible approaches to evaluating an organization's performance in the aspect of greenness: resources of an organization, value chain, and management functions. The main result of this study is the choice of the approach of resources of an organization as the most suitable for evaluating an organization's performance in the aspect of greenness according to the defined attributes.

**Author Contributions:** Writing—original draft preparation, review, and editing, I.S.; writing—original draft preparation and editing, J.S. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Data Availability Statement:** Not applicable.

**Conflicts of Interest:** The authors declare no conflict of interest.
