As a side project / alone or in an organisation? I assimilate the former as theory, usually your work in this sort of project was not challenged by your pair. I

As a side project / alone or in an organisation? I assimilate the former as theory, usually your work in this sort of project was not challenged by your pair. In an organisation, your work has been reviewed, challenged and you had gain real experience from that. I don't know how to categorize the next case: A group side project. The work is challenged, but it is difficult to prove.