This bachelor thesis deals with the topic of data quality and its management. The main goal of this work is to improve the quality of data in a small company. The whole bachelor thesis is divided into two parts. The first half focuses on summarizing theoretical knowledge in the areas of data quality and data management. The theoretical part deals mainly with the following topics: dimensions of data quality, causes of data poor quality, impacts of poor quality data on the company, Data Governance. The second, practical part, deals with the fulfillment of the main goal of the bachelor thesis. In this part, the company is introduced, requirements for data quality from the point of view of business are defined, the processes connected with the ...