Derek Sivers does some “entrepreneurial” math:

AWFUL IDEA = -1
WEAK IDEA = 1
SO-SO IDEA = 5
GOOD IDEA = 10
GREAT IDEA = 15
BRILLIANT IDEA = 20

NO EXECUTION = $1
WEAK EXECUTION = $1000
SO-SO- EXECUTION = $10,000
GOOD EXECUTION = $100,000
GREAT EXECUTION = $1,000,000
BRILLIANT EXECUTION = $10,000,000

To make a business, you need to multiply the two.