"what shall we do about the problem? " is the question that would most likely be asked during the stage of od.

I believe the answer is: treatment of intervention

treatment of intervention stage refers to the stage when the medical workers already conduct proper  assessment and diagnosis toward the patient's problem and try to make a plan to treat them.
In this stage, things such as the rehabilitation program that must be followed by the patient, the type of drugs that must they use, and the the schedule of the program would started to be planned