It is established that there is a hole in the market for cleaning carts; cleaning carts that can be stored in limited spaces are not available. Many companies would prefer cleaning with a cleaning cart rather than cleaning with buckets, as cleaning by using buckets is unhealthy for the cleaning personnel and not as efficient as using a cart. However some deselect the cleaning cart due to the storage size. Therefore, a cleaning cart which could fulfill their needs for storage would be a good alternative. At the same time the cleaning cart developed focused on the work procedures of the cleaning personnel making it both healthy and efficient in use. With development of a cleaning cart as a case, market research, user observation, and active prototyping has been of great use in the project. The case involves 8 different viewpoints around the cart and by investigating these, their different interests are clarified. The interests are valued in regard to each other and translated to criteria which are used to hold the decisions made throughout the development process up against. A wide range of different cleaning situations are observed and the data is processed by using the methods of AEIOU and ELITO. Throughout the project prototyping has been an important tool to validate the different principles and concepts developed.