Comparisons

Factor	DSS	MIS
Problem Type	A DSS is good at handling unstructured problems the cannot be programmed.	An MIS is normally used with more structured problems.
Users	A DSS supports individuals, small groups and the entire organization. In short run, users typically have more control over a DSS.	A MIS supports primary functions of the organization.  In short run, users have less control over an MIS.
support	A DSS supports all aspects and phases of decision making, it does not replace the decision maker- people still make decisions.	This is not true of all MIS systems, some make automatic decisions and replace the decision maker.
speed	A DSS is flexible and can be implemented by users, it usually takes less time to develop and is better able to respond to user requests.	An MIS's reponse time is usually longer.
Output	DSS reports are usually screen oriented, with the ability to generate reports on a printer.	An MIS however typically is oriented towards printed reports and documentation.
Development	DSS users are usually more directly involved in development. User involvement usually means better systems that provide superior support.	An MIS is frequently several years old and often is developed for people who are no longer perform work supported by the MIS.