Decision Engineering is a process that involves applying one’s relative knowledge to develop, build, maintain, and improve decision-making systems currently in place. This “relevant knowledge” encompasses everything from principles and accepted theories in different fields, to those contributed by the people familiar with the context, and even to the practical know-how of decision engineers themselves.

This discipline essentially requires one to fully analyze and understand a particular situation in order to arrive at the best course of action possible.

With this in mind, it’s fair to say that a decision engineer is mainly responsible for designing and developing ways to improve a specific system to make it more efficient and profitable for the business. This can be done through a four-step process that goes from Decision Theory to System Analysis, to Probability Theory, and finally, to Information Science.