Seattle for models of behaviour change which consider individuals as being at discrete ordered stages’, each one denoting a greater inclination to change outcome than the previous stage Rutter and Quine According to Weinstein Weinstein et al. Weinstein and Sandman a stage theory has four properties . A classification system to define stages it is accepted that the stage classifications are theoretical constructs, and although a prototype is defined for each stage, few people will perfectly match this ideal. . Ordering of stages people must pass through all the stages to reach the end point of action or maintenance, but progression to the end point is neither inevitable nor irreversible. For example, a person may decide to quit smoking but not do so; or may quit smoking but lapse back into the habit sometime thereafter. . Seattle 2016.