a method for producing documentation and other information resources.
a class of information repository systems.
The "wiki method" promises better information use and maintenance because the software promises easier editing workflows that conventional web pages and management systems and because wikis like c2 and wikipedia provide powerful case studies for successful "community authorship" where large groups of contributors build a generally useful information resource.
In truth there are a number of problems with using actual wikis for larger scale information resources, given common editorial resources. This wiki pages provides an overview for some of these challenges and suggests possible solutions.
Non-digital resources (books so forth) have centralized authorship and publication processes are known and well defined. Conventional non-wiki digital content tends to have a similar centralized authorship model.
By contrast wikis decenter authorship by making it possible for anyone to edit a text.
Conjecture: By decentering authorship, wikis effectively diffuse responsibility for a resource, and make it more difficult for necessary tasks like proofreading, higher order organization, and indexing.
Typically decentered authorship makes fact checking and corrections easier from a procedural perspective; however, distributing factchecking to the "wiki process," tends to mean that inaccuracies linger longer (which can reduce confidence in a resource.)
Wiki software itself, as separate from the "wiki method," tends to be very powerful and useful. Most wikis provide easy methods for editing and publishing content to the web or to internal networks.1 Having this kind of tooling is not in an of itself a problem, except that it leads to this diffusion of responsibility problem.
As a related, but separate, problem, most wikis provide make it difficult to do "releases," of text, or to review content before publishing.
Pages in an information resource often need to be "living:" updated regularly, changed to reflect changes in the topic matter, product, or the state of the art.
If pages are not reasonably atomic, it's possible for the information to "rot," where it looses internal consistency and where revisions--even major revisions--must happen in a rolling fashion. Combined with the diffusion of responsibility and the general lack of wiki-wide tools for editing, managing, and structuring the information resource, these problems make it difficult to use wikis for many classes serious information resources.
While wikis themselves push you to think about content on a page-by-page basis, to avoid information rot you must approach the totality of a wiki. Typically this means, having a dedicated person or two writing, editing, and organizing content. Like any other serious sufficiently complex "living" information resource.
Too often people link two facts to each other: first that Wikipedia is wildly successful, and second that Wikipedia is a wiki. To compound this problem, the community of editors behind Wikipedia is largely transparent to the people who read Wikipedia.
The result is that you look at Wikipedia, say "We need one of these for our project," without realizing that there are anywhere from a dozen to thousands of people writing, organizing, editing, and verifying the content on Wikipedia. In truth, the amount of rote work involved in wikipedia is astounding, and I'd venture to speculate that the entire venture is a bit inefficient and only really viable because it's a non-profit project and the contributors are all volunteers.
If you're working with a small team, a team that has other projects than maintaining a wiki, an editorial team that's a significant subset of the user/read community, if your editors are your SMEs,2 and you start a wiki without a plan: you're probably already in trouble.
Consider using wiki methodology without wiki software.
I think it's important to separate the methodology from the actual software. Both have their flaws and disadvantages, but there are some cases where wikis make good publishing systems (i.e. tychoish.com is a wiki.) Furthermore, the core of the wiki method (i.e.e "get everyone in a project involved in authorship,") has merit, even if the actual implementation in wiki software isn't often productive.
Fight diffused responsibility. Provide structure, and attention to contribution to ensure quality, encourage efforts, and provide consistency.
Approach information resources systemically and holistically.
Use appropriateto provide good, manageable organization of pages.