Individual or team work?

Individual or team work?  Is it a very common question that you get when you have to do assignment? or when you have to do such of work from your Big Boss? if it's still happen it can be means that you haven't know your position, you don't know who you are. that condition could be found in our daily life too. Have you ever canceled your promise with your friends because of some one? can't do your home-work alone? a plan in your class failed because of one of friend only? or just do intense communication in the Campus with your classmate only? or even  only speak with your friend beside your seat only? if you felt it, means that you can't define when you have to be individual person and when you have work in team.