Most of us are problem oriented as we have been taught by the educational system. The problem with this in coming up with solutions is the process itself. We end up defining a box within which the problem exists. That is the nature of describing known results and their causes.
When we have finished with this analysis we are usually no further ahead in solving it as we can get locked within our problem box and thereby restrict our perspective.
To think outside of the problem box is very simple. First ignore trying to define the problem and instead focus on what the solution would look, sound, and feel like. Then we can look to how we bring about what is now a clear objective.
Working backwards from the solution is thinking outside the box as there are no restrictions being used in defining the solution as there are when we define the problem.