Written by two of the leading SSDAM authorities, this work is aimed at the practitioner already familiar with Version 3 and wishing to upgrade. The emphasis is on the techniques rather than the revised structure and therefore a certain level of understanding is assumed. The book features a continuous case study covering an opera booking system, which supports the text descriptions of the enhanced and new techniques of Version 4. At the end of each chapter a comparison is provided between Version 3 and Version 4.