Design Methods is a broad area that focuses on:
Exploring possibilities and constraints by focusing critical thinking skills to research and define problem spaces for existing products or services—or the creation of new categories;
Redefining the specifications of design solutions which can lead to better guidelines for traditional design activities (graphic, industrial, architectural, etc.);
Managing the process of exploring, defining, creating artifacts continually over time
Prototyping possible scenarios, or solutions that incrementally or significantly improve the inherited situation
Goal of design methods is to gain key insights or unique essential truths that can create more holistic solutions to improve products and services as well as create better experiences for users. Insight, in this case, is a clear and deep perception of a situation (through design methods) by grasping the inner nature of things intuitively.