This is a picture of a can opener that my roommate and I purchased. This looks like a normal can opener but after trying again and again we have found that it does not open cans. The space between the blade and the pressure handle is too great so that it does not grab the lip of the can and is unable to open cans. This is an example of bad mapping because the can opener does not work. It is a good example of bad design because the user, already having the knowledge of how to use a can opener, cannot figure out how to use this tool.
