Traditional project success measurement through the "iron triangle" of time, cost, and quality has proven insufficient for evaluating project performance in today's complex business environment. This research examines contemporary approaches to project success measurement that incorporate value creation and stakeholder satisfaction as primary success indicators, moving beyond conventional constraints to encompass broader organizational and societal impact. Drawing from empirical data spanning 2020-2024, including analysis of over 4,000 project management professionals across multiple industries, this study demonstrates that organizations utilizing expanded success criteria achieve significantly higher performance outcomes. Research reveals that 72% of organizations prioritizing stakeholder satisfaction and value creation achieve project success rates compared to 65% using traditional metrics alone. Organizations with high stakeholder engagement demonstrate 30% improvement in customer satisfaction and 25% reduction in project delivery time. Key findings indicate that business value delivered (46%), customer satisfaction (45%), and strategic alignment (42%) have emerged as the top three measures of contemporary project success, surpassing traditional time and budget compliance. The study identifies five critical dimensions of enhanced success measurement: stakeholder satisfaction, value creation, strategic alignment, organizational learning, and sustainability impact. Contemporary project success frameworks incorporate lessons learned systems that enable continuous improvement and knowledge transfer across project portfolios. Organizations implementing systematic lessons learned processes demonstrate 2.5 times higher success rates in meeting business objectives and 28% reduction in repeated failures across similar project types.