They asked a simple question:
Can JIRA handle a rate of 2000 - 3000 new issues a day, accumulating to over a million issues after a year or two?
Core requirement that gave any chance of success was amount of active users:
- only about 15 people would have access to the system, plus a robot that would receive issues and comments from email queue and send out replies.
You can find the answer and how we have come up with it on our page.