Measuring the Efficiency of Costumer Satisfaction with DEA models

Nowadays, many people are buying various things, food and services at discount portals. It can be said that this is being the hit of the last few years. Slevomat is the main discount portal in the Czech Republic and it is known as very solvent. However, customer satisfaction with the obtained goods or services is varied, at least according to the portal ratings. So it was decided to take the advantage of more sophisticated tests and the knowledge of efficiency measurement to find out how customers are really satisfied. The article uses DEA models that work with ordinal data. The qualitative data are obtained on the basis of the text analysis and changed to ordinal data. Overall, the aim of the article is to measure the efficiency of customer satisfaction with Slevomat for travel services using DEA models. The obtained results give an overview of the industry and compare the results with the given server.