The Romney standard

In April, The economy added 115,000 jobs, a number that fell below expectations and prompted worries of a slowdown in hiring. While the unemployment rate did fall to 8.1 percent The Romney standard, in short, would see the economy add 500,000 jobs per month. The former Massachusetts governor said that an unemployment rate above 4 percent is unacceptable.
What i want to hear is how is he going to achieve these numbers?
Link is here