Definition: A software license that is based on the number of simultaneous users accessing the program. It typically deals with software running in the server where users connect via the network. For example, in a five-user concurrent use license, after five users are logged on to the program, the sixth user is prohibited. When any one of the first five log off, the next person can log on. Concurrent licensing can be managed by the application itself or via independent software metering tools.

Dv TDM Ratio : The ratio we typically see is 1:4 or 1:5 licenses for total users. This ratio is influenced by the amount of time each user spends in the application. (With the application or web interface open). Below are a couple of examples of two opposite extremes of tasks that occur in Dv TDM.

• A user opens Dv TDM to check out a document that he will be modifying. He searches for the document, selects the document, clicks on the check-out button, and opens the document. This task takes approximately 30 seconds and when it is complete, the user no longer ties up a Dv TDM license.
• A company uses **Dv Web to allow customers to review documents online, but does not allow that customer to download, print, or copy the document. (for security reasons, etc) This user will be viewing the document within the Dv TDM viewer and will tie up pa license for a considerable amount of time, depending on the complexity of the document the user is viewing.

The type of user will influence the ratio also. Administrators will spend more time tying up a license viewing audit rails, adding users, adjusting security rights, etc; advanced users will spend more time in the application preparing transmittals, viewing reports, comparing drawings, etc.

If the maximum concurrent user license is consistently reached and employees are not able to complete their work in a timely manner, licenses can be purchased and added in any increment.

**Dv Web does not affect the number of concurrent users or licenses allowed in the system. Dv Web will simply allow the current number of licenses to work via a web browser from anywhere in the world. The number of licenses to be web enabled does not affect the purchase price of Dv Web.