An intelligent advisor system is an adaptive system aimed at intervening when the user of any application software performs complex transfer tasks. An important aspect that needs to be taken into account when designing and developing an advisor system is the strategies and tactics used by the advisor to provide the user with an environment tailored to his or her needs and goals. This book presents the development life cycle of advisor systems as illustrated by two case studies: CODMA, an intelligent advisor in conceptual database modelling, and MUSIC, an intelligent advisor in musical composition. The introduction gives an overview of advisor systems, life cycles, and the book. For each step of the life cycle examined, the next two chapters illustrate the results obtained in the case studies. The first step, "Describing the strategy of intervention," defines the nature of knowledge to be recorded. The second step describes the strategy and means proposed for the knowledge acquisition. Step three describes the content, the architecture, and the implementation in the environment strategy. Finally, the fourth step describes the physical implementation of the system. (Contains 105 references.) (JLB)