One of the most difficult things to do is to justify the addition
of new tasking or a new methodology when what you already have appears
to be working just fine.
Our overview of the many areas
impacted by a good User Centered Design Process will give you
an idea where the best savings can be made.
Books
The best book I have seen to date on this subject is entitled "Cost-Justifying
Usability"
Bias, Randolph G. and Mayhew, Deborah J., eds. (1994). Cost
Justifying Usability. Harcourt Brace & Co. Boston
White Papers & Articles
If you don't have the time or the inclination to read the entire
book, many of the most salient points have been summarized in the
following Compuware White Paper. Click the title to download a PDF
version to print or read at your leasure.
Usability Is Good Business
- Prepared by George M. Donahue, Susan Weinschenk, and Julie Nowicki.
Compuware Corporation. 1999.
Return On Investment for Usable UI Design - Making
the Case for Usable User Interfaces: Examples and Statistics.
Aaron Marcus. User Experience Magazine. Winter 2002 Edition.