I believe (and I could be entirely wrong here), "bias for action" comes from Amazon's leadership principles, it describes this trade off:
>Bias for Action
>Speed matters in business. Many decisions and actions are reversible and do not need extensive study. We value calculated risk taking.
The other successful thing to add onto it, is to tell people what you’re going to do (ex, a high level 3 step plan, not more than 5), then do it. If there are objections, ask [what can be done] to mitigate the issue instead of arguing the points.
Don’t “bias for action” and do something w/o setting expectations first.