How an organization makes its people-related decisions has a huge impact on its success or failure. But traditionally, these decisions have largely been based on intuition and biases and therefore have been prone to error. But now, companies are starting to use data and sophisticated analysis in issues such as recruiting, compensation and performance evaluation because they believe it can help in better decision making. T he Wharton People Analytics Conference 2015 opens in Philadelphia today. Cade Massey , practice professor of operations and information management, and Adam Grant , professor of management and psychology, who lead Wharton’s people analytics initiative, spoke with Knowledge at Wharton about why a data-driven approach to managing people at work is gaining traction. An edited transcript of the conversation follows. Knowledge at Wharton: When we spoke last year about people analytics, it was just before your conference and now you have another conference that begins today.…