If one woman can make a baby in 9 months, then 9 women can make a baby in 30 days. Now you may laugh, but this is the most common problem in developing a new product. Throwing more resources at the problem and praying it goes away does not solve anything.
These are not only the 7 Deadly Sins of Product Development. If you have something to do with IT-Projects they will sound familiar to you too.