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Crisis situations are mass events, independent of the specific threats that cause them. The term "estimated population" is used for groups of more than 100 people, simplifying and unifying calculations and forecasts. Determining the needs of the population in crisis situations depends on several factors: the number of affected people, the size of the area, and the logistical capacity of the responsible authority or institution. Planning for material needs in crisis situations is based on norms and standards related to the requirements of affected people. This article presents the principles of material requirement planning in crisis situations, including the development, implementation, and improvement of standards and norms. The research involved interviews, observations, and analysis of documents provided by local government units in Rzeszów County, Poland, to understand the logistic capabilities and planning processes in place for emergency situations. Additionally, it describes how these standards are applied to determine the optimal size and structure of stocks.

Keywords: Crisis situations, estimated population, material needs, material requirement planning

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