A decision support system is a computerized program that analyzes large volumes of data to help business leaders (and their personnel) make the right judgments in certain situations. The information acquired can lead to better decision making, and this negates the risk of any bad choices that could lead to serious consequences.
This is one reason why businesses use DSS technologies, the other being efficiency. As decisions in business can sometimes take days, weeks, and even months depending on their complexity, having software that can help manage these are be essential. Time can be saved, problems can be solved, and decisions can be made in an informed and timely way.