John Tropea explains an example of wiki use by his team that complements email, takes little time to do, and improves how knowledge workers prepare to handle unique situations:

Another reason wikis are taking off is that so many people at work want to make topic, workaround, best of, to-do pages. The nature of knowledge work is that we deal with uncertainty and unique situations, we can only document so many official processes/procedures; often we need to bend these processes and use our thinking and conversation to respond or get things done on the fly.

We may like to communally create our own informal procedures or workaround lists that contain the ways we responded to situations. Or a list that contains the best documents on a topic; these documents may be scattered in different repositories, and a wiki can bring them together.

What’s happening is that wikis are actually replacing a process, they are becoming a new way to do group work.

Yes.