Introduction

Leadership development is driven by experience; in other words, leaders learn not just through training and developmental relationships but through job and leadership experiences. In training-and-development circles and among human-resources staff, the catchphrase “70-20-10” is a general guideline for combining challenging assignments (70%), developmental relationships (20%), and coursework & training (10%). This guideline suggests that a combination of those learning opportunities, at about that ratio, is optimal for preparing managers for leadership roles. The 70-20-10 ratio should not be taken as a one-size-fits-all solution to developing leaders. However, the pattern that 70-20-10 suggests is clear: On-the-job experiences are ...

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