This paper examines the role of budgeting and decision tools in the strategizing and decision processes and their effect on future routines of the firm. It argues that some conditions must be fulfilled by the decision tools to facilitate the change of the firm routines. The reflection is conducted by analyzing the condition of existence of routines. Routines, as a redundant pattern of action, are essential units of analysis in the evolutionary approach of the firm and in strategic change management. The argument of the work is that for being able to produce new routines a strategic decision--and the way this decision is formulated by using budgeting tools--must have as many common characteristics with the routines as possible. The principal strategic decision tools we study are scenario analysis and real option. The paper concludes that the decision tools can and do influence the routines and the further development capacities of the firm. Therefore if the representation of the future development of a firm is dependent on the vision of the manager, this vision finds a follow-up in the decision tools used.