The correct answer is to begin mapping the value stream by defining the starting point and end point. Then, identify the process steps, any supporting groups, and alternative flows. To determine what can be eliminated, once all time estimates
are added up, look at the value-added and non-value-added times. A review of the requirements is incorrect because this is not as thorough as the identification of the starting point, which may include requirements and the endpoint.
In addition, neither writing user stories or test scripts is the next best step in the activity of value stream mapping.