Casinos are in the business of making money, and they rely on their ability to accurately estimate the chances of winning and losing a game. For example, they need to know the house edge and variance of the games they offer to determine how much profit they will make, and how much cash reserves they will need. This work is done by computer programmers and mathematicians known as gaming analysts. Most casinos do not employ these people in-house, so they outsource the job to outside firms.

Casinos also invest in layout and design to maximize the pleasure of the players. People want to experience a fun environment, and a pleasing environment will make that happen. Casinos use a variety of visual and auditory cues to encourage fun. The bright lights and noise of the slot machines, for example, appeal to the senses and enhance the overall experience. This strategy is considered to be effective in keeping people playing in a casino for longer.

Casinos also implement elaborate surveillance systems. These systems monitor every window and doorway in a casino, as well as every table and betting spot. These video feeds are recorded for later review. Casino security measures also include the use of computer chips to determine the payout of each slot machine.