The analysis of temperatures in the cold store of finished products was realized on the basis of the fact that temperature fluctuations occurred. The analysis in the report is done using Kruskal-Wallis test, Bartlett test, Nemenyi's test Statistical analysis of measured values in individual months. The relationship between the temperature in the cold store and the outside air temperature is investigated. Quality tools are also used in the thesis. The causes of temperature fluctuations are determined by Cause-Effect diagnostics. The relationship between the main causes is analyzed by Relation Diagram. Corrective measures are then determined to minimize temperature fluctuations in the cold store.