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Płk dr inż. Jarosław Tomaszewski
ORCID: 0000-0003-2365-0797

Płk mgr inż. Jarosław Tomaszewski

Colonel of the Polish Army, Head of the Team for Service Outside the State. His research interests are focused on the management of human resources and planning.

DOI: 10.33226/1231-2037.2020.12.4
JEL: L61

The article discusses the problem of analysis and evaluation of income data and its forecasting for 2019 in the selected company. A lot of research tools were used to analyze the primary time series. They allowed to observe trends in the form of a downward trend and seasonality on a monthly basis. The detected trends were examined by applying further research tools, and by building a threeway multiple regression model. The assessment of the conducted analyzes is unequivocal confirmation of the existence of the trend and seasonality on a monthly basis in the primary time series. It became a direct premise to perform the prediction of the primary time series as a result of the critical analysis of literature and personal experience by means of the Holt-Winters exponential smoothing method.

Keywords: revenues; forecasting