Management at one of my companies actually used this metaphor (expressed as below), along with another favorite: "If you put lipstick on a pig, it is still a pig."
"If it takes nine months for a woman to deliver a baby, getting nine women will not deliver a baby in one month."
That's the famous definition of a project manager :). The person who thinks that if a woman can deliver a baby in 9 months then 9 women should be able to do it in 1. It's the "throw more men at it" strategy.
"If it takes nine months for a woman to deliver a baby, getting nine women will not deliver a baby in one month."