By Player Win Profitability,Popular Manufacture ,Average Daily Win,High – Low Volatility Ratio, Return to player, Slot performance,Slot Casino Floor Optimization. "" Slots are King = This evolution has consequently seen slot machines become the dominant source of revenues for many casinos. Brewer and Cummings (1995) noted that slot revenues, on average, account for 50 to 80% of total casino revenues. However, given this expansion in terms of popularity and profitability, it is questionable whether or not there has been a comparable development of analytical techniques to aid in the management of this lucrative department. As Lucas, Singh, Gewali, and Singh (2009) affirm, the U.S gaming industry is rapidly maturing, and advanced analytical methods offer the opportunity for a sustainable competitive advantage. "