Differences between a project work and a non-project work?

Any work done by the project team to accomplish any of the project goals is termed project work. For ex: creating a new screen that displays some information to users.

Any work done by the project team that does not accomplish any project goals is non-project work. For ex: the Team gathering around to analyse the mistakes of the past and identify possible ways to avoid it in future. This may not help in the current deliverables of work but it will do so in future.