Quantifiability is achieved through various methods, including: - Surveillance systems that continuously collect, analyze, and interpret health-related data. - Epidemiological studies such as cohort, case-control, and cross-sectional studies that provide detailed insights into the relationship between exposures and outcomes. - Surveys and censuses that gather data on health behaviors, conditions, and access to healthcare services. - Statistical analysis which includes descriptive statistics, inferential statistics, and modeling to interpret complex data.