Taguchi's Handbook

You may have probably found the recent book of Taguchi :

Taguchi, G., S. Chowdhury, et al. (2005). Taguchi's quality engineering handbook. Hoboken, N.J.
Livonia, Mich., John Wiley

It is a good referecne. With a comprehensive opening chapters about the philosophy of Robust Design and huge number of case studies.