Find the reasons why your solution could be called "a failure."

- First, list the known weaknesses in your solution.
- Then, list the situations where your solution may reach its limits by showing other weaknesses.

For each of these reasons, try to overcome the pitfall to strengthen your solution:

- What improvements can be made?
- How can you get around the difficulty?
- Should instructions, precautions or restrictions be provided?
- ...

If you can't remedy the problem, consider a radical change in your project.