To address this gap, Pakistan’s first-ever twin-index — the SME Environment and Performance Index (SEPI) — was developed in partnership with the Pakistan Banks Association (PBA). A 12-member SEPI Working Group was constituted, drawing from major PBA member banks including HBL, NBP, JS Bank, Meezan Bank, Bank of Punjab, Bank Alfalah, and Bank Al Habib, alongside the State Bank of Pakistan for technical oversight. The methodology was grounded in an exhaustive review of global SME indices from OECD, IFC, ADB, and UNDP, as well as Pakistan-specific sources including SMEDA cluster profiles and SBP financing reviews. Two sub-indices were designed: an Environment Sub-Index comprising 24 variables across 8 thematic baskets, and a Performance Sub-Index spanning 6 thematic areas covering financial performance, workforce, inclusivity, ESG, digitization, and market competitiveness. Key Informant Interviews and Focus Group Discussions were conducted across Islamabad, Lahore, Karachi, Quetta, and Peshawar to validate and refine indicators. A stratified sampling framework was developed, recalibrated from the 2005 CEE baseline and incorporating a booster sample for women-led SMEs. Statistical validation was carried out through Confirmatory Factor Analysis and Multi-Group CFA, while data partnerships were established with PBS, SBP, Pakistan Single Window, commercial banks, PACRA, and Tasdeeq for triangulation.