Too often we build stuff and "expect it to work".
The technical aspects of design have always interested me, and answering the question "How do we know the design is correct?" has always been of interest.
Many of us who wood work for a hobby also work in other technical occupations so I thought the following article might be of interest. It is about software and quality, but the issues seem to be the same for any design/build process.
Is it pleasing to the eye and touch? Will it work? (Is it functional?) Will it work if someone use it in an unexpected mode? (I have seen people turn stools and chairs over and stand on the rungs...) How will it fail? Will it fail safely. Is the usage obvious? Did the pieces fit -- or did I jury rig something leaving a future safety/repair problem. Are there "safety threats" such as sharp corners, and edges, is the material hazardous, can fingers, or clothes catch in unexpected ways, will it fall over? etc.
Anyway -- just some food for thought.
This was the article that lead me to finding the previous.