Book excerpt: Crack the Case System is a complete training program, covering every aspect of the infamous "case interview" favored by top management consulting firms and a growing number of Fortune 500 companies. David Ohrvall's step-by-step approach combines practical instruction on structuring, analytics and communication, as well as insider tips and insights gained from training thousands of candidates. CTCS includes over 150 bonus videos on mbacase.com, 42 practice cases, homework and drills. About the author: David Ohrvall is the global expert on the topic of case interviews. A dynamic and sought-after speaker, he trains several thousand MBAs and undergraduates each year at premiere business schools around the world, including Wharton, Stanford, Harvard Business School, Chicago Booth, Duke's Fuqua School of Business, INSEAD, Oxford and Cambridge. David also has an extensive private coaching practice that has helped launch hundreds of candidates into consulting, venture capital, and a variety of industries. David is a former management consultant (Bain & Company), and a graduate of the Wharton School (MBA & undergrad). Learn more about David at www.mbacase.com.