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Parallelly to this course in Ubiquitous Computing we've studied a course in Design Methodology. The methods being used in the iBrush project will become a report in the course Design Methodology. We here present some of the major methods in our work with developing iBrush.

The development cycle
The developing process of iBrush can be divided inte four stages: generating ideas, development of concept, prototype and evaluation. During the stages we've used different methods and some of them are presented here.

• Generating ideas – We did methods like Brainstorming and Interaction Relabelling. When doing Interaction Relabelling every group member brought a thing to discuss around in order to get new approaches and other use areas (see picture with keyboard, shoe, toothbrush and bottle opener). The method gave us a lot of good ideas and it was here that the music toothbrush idea arised.

All the ideas were written down on Post-it papers and later on structured by the method Affinity Diagram and MindMap. We've picked out the five best ideas and wrote scenarios to them.

Development of concept – in order to find out how children brush their teeth we did observations of four children brushing their teeth. We wanted to see how they move the toothbrush in their mouth and with which tempo the brushing is conducted. We also wanted to see if there occurred other activities during the brushing and if the children experience brushing as a joyful task. When the children brushed their teeth we saw that their brushing tempo and the brush movements were not as developed as the adults ones. They didn’t brush with the same high speed as an adult does.

We also did a small poll to parents where we asked about their children's tooth brushing habits. With this data collections we got deeper knowledge of children's brushing.

• Prototyping – the major stage was the prototyping stage. We started early to test different technologies like accelerometer for example. We searched information about those technologies, did programming in Java, serial communication, radio communication, structure of the website and layouts for the toothbrush tubes.

• Evaluation – later in the project we did an evaluation with three children from our target group. We wanted to base our design choices on what they liked. You can read more about the evaluation under the link User testing.