Related:

• The first 90% of a project takes 90% of the time, the last 10% takes the other 90% of the time.
• The first 90% of a project takes 90% of the time. The last 10% of a project takes 90% of the time.
• If you're right 90% of the time, why quibble about the remaining 3%?
• Ninety-Ninety Rule: n. "The first 90% of the code accounts for the first 90% of the development time.
  The remaining 10% of the code accounts for the other 90% of the development time....
• Ninety-Ninety Rule n. "The first 90% of the code accounts for the first 90% of the development time.
  The remaining 10% of the code accounts for the other 90% of the development time....
• Computer programs are 90% debugged 50% of the time.
• Focus 90% of your time on solutions and only 10% of your time on problems.
  -- Anthony J. D'Angelo, The College Blue Book...