There are three more common types of decisions when using information systems for decision making. These are;
- Unstructured Decisions
- Semi-Structured Decisions
- Structured Decisions
Unstructured decisions generally serve the lowest management. They are usually subjective, so there is not right or wrong answer as such for them. Because of this, they are often harder to solve, and efforts are made to turn unstructured decisions into structured decisions by setting hard and fast criteria.
Semi-structured decisions lie between unstructured decisions and structured decisions. As such, they can sometimes follow a linear pattern and can be easily solved, and on the other hand, they can always be much harder to find a solution for. They are used by middle management generally.
Structured decisions follow a set of rules and are generally for the upper levels of management. This means that they decisions can be taken objectively as there is a clearly defined method of finding the solution. Because it is better structured, there are a number of operational research techniques to help reach structured decisions. These include linear programming and network analysis.