A Better Definition
The true value of process improvement is realized when individuals work differently and find benefit in doing so. Not all new practices need to be written as processes. Sometimes teaching new skills and practicing them is enough. Sometimes course materials are all you need. At other times, simple one-page summary sheets are sufficient. The most important reason people write documents is to use them to help do their jobs, but far too often they are written to solely satisfy some other group outside the company (such as ISO). Ultimately, a document should be used as a reminder of what to do. If you are writing documents right now, make sure they are useful.