Not too long ago metadata was seen as an unwanted necessity. From just a WCM SEO tool ten years ago, metadata has evolved into a powerful mechanism that brings relevant content to you on no-matter-what-system you work on.
Metadata is the driver behind faceted navigation and search (as found in SharePoint 2013), allowing users to find their information more quickly and reliably than before. Being able to find documents better has numerous benefits to the organization:
Making proper use of metadata may lower typical document search time by as much as 50%. Let's assume that your ECM solution has one million documents and half of the documents is looked up at least once, which takes approximately (this is optimistic!) one minute. The net savings of implementing metadata is then already a staggering 4100 man-hours!
Now let's assume that one out of every fifty searches, your employee cannot find the document s/he knows exists. The employee then recreates the document based on an old version and re-submits it to the ECM solution. Increasing findability will help save the organization of getting serious data duplication issues.
At one of our clients we found that out of a subset of their document collection, 38% of the documents were either duplicates or incorrectly versioned documents. My advice: If you have a million documents in your solution, you have a million reasons to start thinking about metadata.
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