Well, if you determine your PICO question is not fully answered or you have gained new information (e.g. a new drug came on the market; you discover your patient desires a holistic approach you are unfamiliar with; your research demographic had to be adjusted), then you would cycle back to ASK or ACQUIRE with your new goals in mind.
If you are satisfied and wish to write up a case study or literature review, now is the time to proceed onwards.