Imagine you like something and have 40 hours implement it. Now spread those hours over one week, or over several months. Second cas will be much better because

Imagine you like something and have 40 hours implement it. Now spread those hours over one week, or over several months. Second cas will be much better because people will contribute ideas, you spend some time thinking about this task outside your job and so on. There is some overhead with constantly restarting your work, but that is negleable with good methodology.