21st Century Product Development faces challenges balancing market demands for Faster, Better, Cheaper products with societal and environmental concerns. Developers must consider resource preservation and emerging technologies. Deep-Tech categorizes evaluation into innovative current tech and emerging tech design. Balancing these ensures market sustainability. Extensive research since the mid-20th century established a philosophical foundation for technology's societal benefit. This book aims to enlighten developers on historical and philosophical perspectives, compiling modern methodologies and techniques. It elaborates process steps in a sequence, named as Define-Configure-Connect- Design (DCCD). Certain essential aspects like uncertainty analysis, risk assessment and mitigation, failure analysis and forecasting are included. A set of modern quality tools is also presented.