Is it also also easy to correct the flaw? Not at all. If everyone involved in the project (everyone with a stake in the success of the project) agrees to give

Is it also also easy to correct the flaw? Not at all. If everyone involved in the project (everyone with a stake in the success of the project) agrees to give an agile process an honest chance, great. If not, you'll have trouble. A similar rule applies for coding standards, for test coverage, for security and logging, for transactional safety, for dieting, and for getting out of debt.