Changing fast environment forces the Polish companies to search for factors assuring them an adequate long-term competetive ability, which can lead to advantage over other companies. The study of decision proccesses and their influence on competetive ability require to determine factors, which mould this potential. Both decisions and whole strategy should be guided on increasing values that build the power of organisation in its environment. In this article author presents also a model of decision making in the context of increasing competetive ability.