Design thinking works for any organization, regardless of its size, profile or scopeof activity. Computers, children s incubators, transport services and projectmanagement applications have all been designed using design thinking approaches.Implementing design thinking in an organization and embedding the rules of thisapproach is a complex task. For this process to run smoothly and for employees toknow their roles and goals, various methods are used to support design thinking.One such method is the DTMethod, to which this manual is devoted.The DTMethod (design thinking method) is a description of actions that an organizationshould take to increase the likelihood of success in the design process. In other words, itis a guide to design thinking.The DTMethod is built on a foundation of three elements: knowledge, case studies andexperience. There is scientific evidence behind the DTMethod. The study conductedwith scientists (Dukala et al., in press) confirms that teams who work with the DTMethod create solutions that are more original, more valuable for business and moreuseful, and have a higher impact on the challenge than the teams who work with othermethods (including brainstorming and other collaborative modes). The effectiveness ofthe DTMethod is also confirmed by many years of practice. The three elements cometogether to yield the proven rule set that is the DTMethod.