System K: Applied Research and Applied Framework develops the practical application of the Theory of Real Value through a structured series of case studies and economic analyses. The book examines how economic activity can be measured and analysed through the K unit across commodities, productive sectors, public finance, national economic structures, and international trade. Applied studies of gold, steel, aluminium, cement, agricultural products, and other goods demonstrate how the methodology operates under different production and market conditions. The analysis follows the three fundamental levels of the System K framework — Production, Distribution, and Market — examining how each contributes to the measurement and interpretation of economic value. The book also extends the framework to national economic analysis, public finance, productive surplus, international trade, and the broader analytical applications of the K unit. Rather than presenting the case studies as isolated examples, the book uses them to examine whether a common framework of real-value measurement can be applied consistently across different economic activities and levels of analysis. From production measurement to economic application, System K is presented as an applied framework for investigating economic value through a common unit of measurement.