Snowball sampling is a non-probability sampling technique that is used by researchers to identify potential subjects in studies where subjects are hard to locate.nowball sampling is a non-probability sampling technique that is used by researchers to identify potential subjects in studies where subjects are hard to locate.
In configuration management, a baseline is an agreed description of the attributes of a product, at a point in time, which serves as a basis for defining change. A change is a movement from this baseline state to a next state. The identification of significant changes from the baseline state is the central purpose of baseline identification.
Definition of baseline. 1  1 : a line serving as a basis; especially : one of known measure or position used (as in surveying or navigation) to calculate or locate something. 2  2a : either of the lines on a baseball field that lead from home plate to first base and third base and are extended into the outfield as foul linesb : base path.