Vast consumption of natural resources threats the human life. Growing scarcity of fresh water is posing a great challenge to humanity as well. Thus many governments take special measures for efficient use of freshwater. There are many products that use too much fresh water. Toilet is among these products. In search of new solutions for lack of fresh water, designers design alternative toilets. However, it is necessary to understand the evolution of toilets and current state to develop better new technologies and products. This thesis investigates the evolution of toilet design throughout the history. Factors affect toilet design, and changes in their improvement throughout the evolution of toilets are examined. The study also aims to investigate advantages and disadvantages of squat and flushed toilets and their current state.

This thesis work in information design with a focus on spatial design is about how people's needs, in addition to the natural ones, can be considered in a handicap toilet to include a broader target group. The study is a case study and was conducted together with the research institute Rise Sics, which is a multicultural company with employees of different ages. The empirical material that has been collected is through participatory observations, questionnaire surveys and focus groups. The study's questions are answered with the help of the collected empirical data and of the chosen theories about how a room can be made available through color and light and with principles in interaction design: affordance, signifiers, constraints, mappings, feedback and conceptual model. The aim of the study has been to deliver a design proposal that shows a breadth of inclusion aspects. The hope of the study is that it will inspire a change in other public toilet spaces, as the study has shown a need to change the toilet culture that exists today. / Det här är ett examensarbete inom Informationsdesign med inriktning rumslig gestaltning. Studien handlar om hur människors behov, utöver de naturliga, kan inkluderas på en handikapptoalett för att inkludera en bredare målgrupp. Undersökningen har gjorts som en fallstudie tillsammans med forskningsinstitutet Rise Sics i Västerås som är ett mångkulturellt företag med anställda i olika åldrar. Det empiriska material som har samlats in är genom deltagande observation, enkätundersökning och fokusgrupp. Frågeställningen i arbetet besvaras med hjälp den insamlade empirin samt av valda teorier om hur ett rum kan tillgängliggöras genom färg och ljus samt med principer inom interaktionsdesign: affordance, signifiers, constraints, mappings, feedback och conceptual model. Målsättningen med studien har varit att leverera ett gestaltningsförslag som visar på en bredd när det gäller inkluderingsaspekter. Förhoppningen med studien är att den ska inspirera till en förändring på andra allmänna toalettutrymmen, då det genom arbetets gång visat ett behov av att förändra toalettkulturen som finns idag.