This study evaluates energy efficiency in India’s energy-intensive industries using Total-Factor Energy Efficiency (TFEE), contrasting it with the traditional Single-Factor Energy Efficiency (SFEE) approach. Analyzing panel data from 2003–04 to 2021–22 from the Prowess database, we applied Data Envelopment Analysis (DEA), including the input-oriented Slack-based method with variable returns to scale, to assess attainable energy…
