Mohamad Adam Bujang is a statistician, data analyst, and research consultant recognized among the Top 2% Scientists Worldwide by Stanford University for both career-long and single-year achievements. He specializes in research methodology—particularly questionnaire/scale development and validation, sampling techniques, and sample size planning—and has authored over 100 scientific articles and four books on research design and methodology. His notable contributions include the development of the Health-Related Quality of Life Scale (HRQ-6D) and the Significant Quality of Life Measure (SigQOLM), both of which are freely accessible to researchers worldwide. With more than 7,000 citations currently, his work has significantly influenced health research measurement and methodology.