Criticism is frequent, frank and relatively comfortable.

When creating a team for a project or task, everyone is giving a direct role to work on. With everyone working on a specific task, positive and negative feedback is needed in order to produce a successful end result, better know as constructive criticism.

In order to benefit from constructive criticism, the first step is to focus on behaviours, and only the behaviours. As you may have noticed from your own experience, criticizing a person’s characteristics or personality traits very rarely works well. If ever. Criticism specifically focussed on behaviours is much more likely to be understood and accepted. Criticism based on our behaviours is easier to accept than criticism of our personality or characteristics because it is based on "what we do" rather then "who we are". This supports the statement we often hear especially from our parets "you can change what you do, but not change who you are." Meaning, you can change your actions but not your personality.

An example:
When you interrupt me in front of a client it causes a problem (Behaviour)

Would probably feel easier to accept than

Your arrogance is causing a problem (Characteristic /Personality trait)

Criticism that is seen as being objective is always easier to understand and accept. Changing the behaviour or giving constructive criticism is very important. The statement above is cut and dry, frank but at the same tile relatively comfortable and informative, it gets the point across. Criticism is also based on facts vs. assumptions. You cannot assume you know everything about someone. Assumptions can be argued against, and facts cannot.

When I talk about there being three errors in the report you gave me - thats a fact
When I tak about your lack of interest in your work - thats an assumption

Constructive criticism makes a project better. It gives truthful facts and errors in someone work but giving them constructive feedback to make it better benefits both yourself and the team. It's difficult to disagree with facts, its's easier to disagree with assumption.