Describe a difficult problem that you have solved during this project. State how you decided which the critical issues were. Say what you did and what your solution was. What other approaches could you have taken?
every problem may has smart solutions if we see it from other sides .. it may be the reason which can make you see some thing you've never noticed before or to change your mind so that change your world.
a lot of problems i've solved like this i hope i can help you..