Just because an employee does things differently doesn't mean he or she won't do the job right or as well. If you establish expectations of the goal and the standards to follow, then methodology shouldn't be an issue.
Harvey MackayMany, perhaps most, people who lose their jobs are mistaken about the reason for which they lost their jobs. Some will say that they're failures, others that their boss had it in for them, and others yet that they were sure their career ended because of a stupid faux pas they made at the company picnic.
Harvey Mackay