Costs of not testing an implementation

["Chan, Chung Ming" <Ming.Chan () SpirentCom COM>]

Hi,
        I'm trying to gather some data to justify the needs of getting
protocol conformance testing tools for testing out the products before
deployment.
        Especially if there is any study on what is the cost of not doing
enough testing before deployment and that cost comparing to the cost of
getting the tools.


        If any of you can point me to any useful link, it will be great!


Thanks in advance!