1. A method of managing a flow test in which a flow rate of fluid of a well is determined, the method comprising the steps of: receiving measurement data corresponding to fluid flow output from the well; operating a computer to identify a flow test time interval over which stable output flow measurements are represented in the received measurement data; operating a computer to determine an end of the flow test time interval; and then notifying a user of the completion of a flow test of the well, the flow test corresponding to the received measurement data over the flow test time interval.