Design for errors

Example of Nielsens usability principle "design for errors" emerges in this "there I fixed it" -type of improvement of attached traditional finnish craftmanship.

Another good principle of "keep it simple" has failed in this case and there is some reported cases, when somebody has carefully closed the door behind - and locked a poor soul into the hut. Then again the repair (red string going inside the door) is kind of simple too ;)