How do you develop an emissions certification strategy for a global vehicle platform?

Global certification strategy involves: 1) Regulatory mapping - identify requirements for each target market (EPA/CARB, Euro 6d, China 6b, BS6, etc.); 2) Test cycle analysis - WLTP, FTP-75, US06, NEDC, determine worst-case cycles for calibration; 3) Hardware commonization assessment - determine if single aftertreatment system meets all requirements or region-specific variants needed; 4) Calibration approach - base calibration covering intersection of all requirements plus market-specific adaptations; 5) Testing sequence optimization - leverage testing across cycles to minimize total test burden; 6) Production conformity planning - surveillance requirements for each authority. Consider lead times for certification, testing capacity constraints, and regulatory timeline changes. Documentation must support self-certification (USA) and type approval (international) requirements.