The development of expert systems in construction management has been widely implemented to deal with heuristics involved in construction decisions. The role of the construction foreman, particularly his span of control (number of subordinates) has not received the degree of attention it deserves in research and in expert systems. Situational analysis offers a systematic way to solve questions concerning span of control and their relationships to context variables effects on crew size. An expert system currently in development is based on the situational analysis approach. Using the system enables determination of a suitable span of control for a given set of context variables.