Water heater has increasingly become an essential household item in our lives. What are the chances of people wanting their need to be met, which in this case, shower with varying temperature. Water heater seems like the solution to the aforementioned need. Human-centered design (HCD) is an approach that prioritizes human needs, capabilities, and behavior first, then proceeds to design so as to accommodate those needs, capabilities, and ways of behaving (Norman, 2013). It is a human-centered design as human needs such as showering with hot or cold temperature are considered and put into work.
Water heater is a good design as it also includes good communication, which in this case from machine to person, showing people what actions are possible, what is happening, and what is about to happen (Norman, 2013). There are signifiers on the water heater, telling that their needs are going to be met by just simply pressing, clicking, or pushing.
Norman, D. A. (2013). The design of everyday things. New York: Basic Books.