A problem is anything that is difficult to overcome:

• A difficult obstacle or goal – a challenge that you need to find a solution to
• Deviation from the standard – if you need to determine the cause of a problem. A situation where what usually works well, suddenly does not!
• A gap between the real and the ideal – things are great as they are for now but could be better in the future. It is working jut not the way you want it to.