Research suggests that humans are biased, not-very-rational decision-makers. We believe we see things clearly when the evidence shows otherwise. Throw in a big dose of optimism, and it's easy to see how estimating software projects can be problematic. Our best hope is to construct diverse groups with varied viewpoints.

With API testing, if you change how the API works—even if it now works better—it will break all of the code written by people using the API. Consequently, testers have a responsibility to make sure they are testing the same contract that was established when the API was first released. Here's how to test APIs right.

As a leader, your job is not to be the boss and check on every task, but to provide value to your team, helping them grow, learn to fix things, and make decisions without you. One of the best ways to provide value is by asking questions. Questions clarify expectations, confirm understanding, and build relationships.