Conyac で依頼された翻訳結果を公開

The theme is defined as a "Problems that must be solved".
Therefore, I think the challenge is to show things that have to be done to solve the problems.
Concrete examples are as follows.

Problem: company revenues are going down
Challenge: company revenues must go up
Solution: raise company's proceeds, lower the expenses

Difference in problem and challenge
Problem: phenomenon or situation when you say things like "...can't", "...is impossible"
Challenge: to tackle things and a decided topic

Challenge of obstacles on the way to achieve that matter: consider what can and should be done to achieve that matter