Valuation uses the same process as the review and analysis, only backwards. The same system is used to apply a value to a service as is used to analyze and opine. Detailed information would be needed from a medical expert to indicate what procedures need to be performed, including any pre and post-op exams, imaging, laboratory, therapies, etc. Also hospital stay; inpatient or outpatient, duration of stay, duration of the procedure(s) in order to accumulate anesthesia and operating room charges. Depending on the scenario, this can be very simple or become extremely complex process.