Background. Taking the nature and dynamics of the environment of modern organisations into account, it is necessary and crucial to manage stakeholders, which is effective when such groups are identified that actually determine the organisation's ability to achieve its goals. The need to identify stakeholders is also justified by the overriding management goal of maximising the value of an organisation, as stakeholders can be regarded as the areas of value growth in the environment or those who

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... ave value-creation factors. Both the results of a literature review and the author's experience in management practice imply the need to develop tools accessible for decision-makers to support the identification of stakeholders and to analyse and evaluate their influence on the organisation's functioning. Research aims. The purpose of the paper is to present in detail an original methodology for identifying the organisation's strategic stakeholders, which will address the research problem by assessing the influence stakeholders have on the achieving the organisation's strategic objectives and, consequently, identifying the stakeholders of strategic importance. Methodology. The MISS is a methodology with a set of tools supporting managers in analysing and evaluating the internal and external environment of their organisation, which is comprised of various stakeholder groups. An analysis and evaluation are conducted in a multi-stage manner and lead to the prioritisation of stakeholders and the emergence of those of strategic importance to the functioning of the organisation studied. Data collection methods for the MISS are focus group interviews and individual structured interviews. Key findings. The MISS supports decision-making in organisations by enabling decision-makers to systematically assess the direct and indirect impact potential of stakeholders on the strategic goals of the organisation. The results of the analyses indicate the elements of the system (the organisation's environment) of the highest value, thus determining the allocation of resources. The conclusions also show the