Refactoring is a disciplined technique for restructuring an existing body of code, altering its internal structure without changing its external behavior. Its heart is a series of small behavior preserving transformations. Each transformation (called a ‘refactoring’) does little, but a sequence of transformations can produce a significant restructuring. Since each refactoring is small, it’s less likely to go wrong. The system is also kept fully working after each small refactoring, reducing the chances that a system can get seriously broken during the restructuring. — Martin Fowler http://www.refactoring.com/
In other words, refactoring is making your code cleaner, safer, and easier to use. Understand can be a very powerful tool in your re-factoring arsenal. Here are a few ways you can use Understand in your refactoring process.