How important are users to software maintenance and what is

How important are users to software maintenance and what is their role. Orignial responses only please and it needs to be in 100 words or more.

Solution

A software means and must be a solution to the present tragical generation changes and transactions to provide complete feasibility and compatibility to any situational queries arised under any moment by the users in no time.

To fulfil this the software must enrich the following roles periodically:

These play a major role upon software maintenance which is essential .