p.14 To perceive, we typify: there is no alternative. Without structure, perception is chaotic and any account of the world must typify. One of the most difficult tasks in qualitative social science research is deciding just what kind or level of typification is useful in the appraising of field notes and interview transcripts in order to allow the material to release its sociological messages (Martin & Turner, 1987; Strauss, 1987; Turner, 1988).

p.15 In making sense of our experience we need to produce from a set of qualitative data a theoretical account which summarises our understanding of possible regularities associated with the set. These regularities will have the potential of unifying not only the empirical data which we have already dissected, but also other material which we have not yet seen... The theory will not list our experiences, but will offer an arrangement of those experiences which we find useful and which might be useful to others.