The deterministic method, which USES the safety factor decided by experience to describe the effects of randomuncertainty on the structure, doesn't solve the random problem.
The model indicates that three types of parameters affect the ADCP discharge measurement randomuncertainty: ADCP system parameters, river hydraulic parameters and field operation parameters.
As in: chaos and uncertainty and random and unreachable and unchangeable.You gotta treat this as a situation where you are dealing with someone you don't know.