Every manager knows that hiring people is a tricky process with little room for error. After all, one bad hire can lower productivity, drive away customers and poison morale. In fact, the average hiring mistake costs a company $1.5 million or more in hard costs and countless wasted working hours. This statistic becomes even more startling when one considers that the estimated hiring success rate for the typical manager is only 50 percent.

But bad eggs can be hard to detect during the interview process. Candidates can exaggerate or be less than forthcoming, and hiring managers often rely on out- dated interviewing methods that seem effective but don’t produce enough reliable information before it’s too late.

That’s why Geoff Smart and Randy Street developed their A Method for Hiring, which is the focus of their book, Who. Based on more than 1,300 hours of interviews with more than 20 billionaires and 300 CEOs, the A Method explores the fundamental elements of the hiring process. It also offers step-by-step interview methods that help managers clarify their hiring needs and expectations, reveal more information about candidates, and help weed out B and C Players quickly. This ensures that new hires have the right skills and are cultural matches who are there for the long haul. The A Method helps source A Players, offers strategies for convincing A Players to come aboard and ultimately helps companies focus on who decisions as often as they focus on what decisions.