Användbarhet är idag en del av människa-dator interaktion som bl.a. Södertörns högskola satsar på att lära ut. Syftet med denna undersökning är att belysa användbarheten på Södertörns högskolas hemsida. För att definiera användbarhet används den internationella standarden för användbarhet (ISO 9241-11, 1998) samt människa-dator interaktionsforskaren Jacob Nielsens definition av användbarhet. Detta har genomförts genom en observationsstudie med fem användare. Resultatet visade tendenser till användbarhet men visade också betydelsen av uppsatta användbarhetsmål. / Today, usability is a part human-computer interaction which Södertörn University, among others, is teaching to their students. The purpose with this survey is to illuminate the usability of the website of Södertörn University. To define usability the international standard for usability (ISO 9241-11, 1998) was used as well as the definition of usability by the Danish human-computer interaction scientist Jacob Nielsen. The survey was done with a number of observations with five users of the website. The results showed tendencies towards the usability but also showed the importance significance of usability goals.

(in English): Chatbots are automatised computer programs which are built to simulate an exchange in communication with a human being. Simultaneously, they provide new user interfaces. In 1994, Jacob Nielsen defined ten heuristic rules that are traditionally used within the design of user interfaces. This thesis's aim is to find out whether these ten rules are applicable in new fields of conversational environments. Secondly, what are the conditions under which the exchange becomes possible. The matter was examined through a qualitative research with the sample of eleven respondents who'd created chatbots within the Czech professional environment. The next step was a grounded analysis of existing established theories. The theoretical part explains the context in which chatbots are being created. It also shows theoretical canons of user interfaces which are the base of data and experience for the researches.