Justifications for a test/development server
At my current workplace, the production SQL server and web servers are also used as development and test servers. I've asked for dedicated servers, but been refused as I can't justify it to satisfaction (the reasons against being cost of software, software licences and hardware resoureces).

So, what justifications are there for a dedicated test/development server (a combined server at the moment - I don't want to push my luck and ask for 6 servers!)?
Justifications for a test/development server
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At my current workplace, the production SQL server and web servers are also used as development and test servers. I've asked for dedicated servers, but been refused as I can't justify it to satisfaction (the reasons against being cost of software, software licences and hardware resoureces).

So, what justifications are there for a dedicated test/development server (a combined server at the moment - I don't want to push my luck and ask for 6 servers!)?