Summary of “Why the Most Productive People Don’t Always Make the Best Managers”

They are valued skills and make people more productive, but all except for the last one focus on the individual rather than the team.
Although highly productive individuals are not loners, hermits, or curmudgeons, being highly productive often does not require a person to have excellent interpersonal skills.
While highly productive individuals can be relatively self-centered, leaders and managers must place the organization above themselves.
While the best leaders are highly productive people, the most highly productive people don’t always gravitate toward leading others.
Managers need to be aware that the skills that make individual contributors effective and highly productive are not the only skills they will need to be effective managers.
We are convinced that the best time for individual contributors to be learning these managerial skills is when they are still an individual contributor.
New managers tend to be overwhelmed with their new responsibilities and often rely on the skills that made them successful individual contributors, rather than the skills needed to manage others.
Then when you promote your best individual contributors, you can be more certain that they’ll become your best managers.

The orginal article.