To err is human. It is nevertheless difficult for most of us to admit to having erred and to make corrections on our view on the world. However difficult, continuous development is the very essence of learning. The more objectively one learns to observe the facts and one's own assumptions the faster it is to make the corrections.

• Defining objective measurements for development enables to see how much there is progress without having to rely on mere gut feeling.
• Writing down all the assumptions made in a project plan and the logical consequences of those assumptions can help to detect if some of them fail.
• In an online course, one assignment can be to consider the weaknesses of the theory presented or even one's own answer to induce critical thinking.
• When planning a project, it is wise to write down the necessary conditions under which the project should be carried on, and what are the indicators for changing the strategy.

To approach things more objectively it is useful to reflect past failures and to develop new strategies based on those learnings.  

Think about the last time you failed. Is there something that could help you realize this faster if you are faced with a similar situation?

What objective signs your team could use to indicate a need for a change of plans?