Some time has passed by but when I read this memoire I find that it is still up to date, especially its application on the strategical frameworks, so I decided to make it public. What is digital transformation? How does it impact strategy making? These are the two main questions treated in this paper. The main components of change are: the customer experience, the operational processes, the change in business models and employee empowerment. The originality of this paper is the observations of the changes through the lens of strategical frameworks.The research has revealed the publications of Cap Gemini Consulting, Roland Berger, Mc Kinsey, and Banque Populaire d'Investissement (BPI) to be very useful. The second part about Val d'Isère has been left out for confidentiality reasons.