Recent studies show that attrition rates for outside hired executives are high. Some say between 30 and 50%, and many of these failures will occur within the first two years. The statistics are not much better for internally promoted leaders. The first 90 days of a new leader's tenure will often determine ultimate success or failure. Onboarding programs are prolific and helpful, but they are not designed to prepare new leaders to secure early successes while avoiding costly mistakes. Something else has to be done to reduce this alarming attrition rate. The author is a veteran executive...