The case for fixing the broken rung is powerful: If women are promoted and hired to first-level manager at the same rates as men, we will add one million more women to management in corporate America over the next five years. And we will set off a chain reaction that will eventually lead to parity across the entire pipeline.

Here’s what companies can do to fix the broken rung:

Set a goal for getting more women into first-level management

Require diverse slates for hiring and promotions

Put evaluators through unconscious bias training

Establish clear evaluation criteria

Put more women in line for the step up to manager

Learn more in the full report.