The concept of consistency, applied to organizations, provides the common thread for a model of decision making that considerably enriches the models traditionally used in organization theory by adding a humanistic and ethical dimension. Extending the theory of human motivation to encompass a variety of motives, we state three conditions for long-term organizational well-being: effectiveness, efficiency and consistency. These three conditions are not independent of one another, nor can they be reduced to one another. Consistency plays a key role as a driver of trust in organizations and is a means of introducing ethics into management theory and practice