If one has a one idea and another also has one idea if they share each other finally each got two ideas Task achievement having both perspective either it can be as a whole team and a individual both and both ways are according to the need is dependable upon task.But if we are working as a team more and more productive ideas generates and it is good for all those who are working in a team during that a lot more skills develop like interpersonal and leadership better communication right thinking for the right purpose these are some key factors of the success.