How to choose a research topic

               Unrecognized
                    |
                    | (This is a hard place to
                    | do your research)
                    | our research)
                    |
                    |                           Solution method
low ----------------+------------------ hi      Risk
                    |
                    |
                    |
                    |
                    |
                    | Most research
                    | is done here

                Recognized

                 Problem
               significance