Look for the unexpected.

Unex­pect­ed impacts may not have had an indi­ca­tor iden­ti­fied. Look at raw data for out­liers and unex­pect­ed results and con­sult the indi­vid­u­als direct­ly involved in data col­lec­tion about their obser­va­tions. Such anec­do­tal evi­dence may indi­cate the need to update mon­i­tor­ing approach­es based on unan­tic­i­pat­ed complications.