About ACS

We’ve decided to devote our careers to decisions.

ACS provides extraordinary business war games, strategy simulators, and workshops on strategic thinking.

In 1986 Mark Chussil joined with Professor David Reibstein of the Wharton School to make something new and great, something never before possible, something that combined state-of-the-art strategic thinking with computer-based simulation. They called it ValueWar™.

In 1990 Chussil left the Strategic Planning Institute after 15 years of strategy research, followed by years at a cushy job in industry, to launch Advanced Competitive Strategies, or ACS. ACS had ValueWar™, a strategy simulator like no other: a tool built for smart, experienced strategists. You would tell it your goals, your competitors, your industry dynamics, and it would tell you what would happen if you did, well, whatever you thought to do. It wouldn’t offer an easy answer like some sort of guru or crystal ball, or a comfortable answer like the typical spreadsheet that assumes your competitors are sitting still. Instead, it would shock you. It would help you see your business—and the decisions before you—in an entirely new way.

While ValueWar™ has since evolved into an award-winning machine, our underlying philosophy has not changed. ACS is about much better decision-making. About making paradigm shifts real, separating the past from the future, and distinguishing the truly innovative from the copycats.

It is this single-minded purpose since 1992 that has led ACS to this point. We’ve become the leader in business war games, Decision Tournaments™ (such as the Top Pricer Tournament™), and strategy simulators. We’ve published scores of articles and essays, in the Harvard Business Review online and elsewhere. We’ve educated thousands of business executives at the largest, most-respected companies across industries and continents. We’ve helped dozens of companies avoid disaster and find opportunity. That’s why ACS is here today. And why you’re here with us.

ACS is based in the United States. We’ve worked with companies, universities, and conferences on six continents.