Contemplative QuestionsWhat are the 4 types of information
systems?How are they different?Who are the primary users?How much
data is being stored by each?How much data is being read (queried)
by each?
Types of Information Systems
TopManagersMiddleManagersFirst-LineManagersOperativesExercise.
Match the type of information system with the organizational level
where they are most commonly used:
Transaction Processing Systems (TPS) Management Information
Systems (MIS) Decision Support Systems (DSS) Expert Systems
(ES)
Types of Information Systemsand Systems DevelopmentTransaction
Processing Systems (TPS)Automate handling of data about business
activities (transactions)Management Information Systems
(MIS)Converts raw data from transaction processing system into
meaningful formDecision Support Systems (DSS)Designed to help
decision makersProvides interactive environment for decision
making
Types of Information Systemsand Systems DevelopmentExpert
Systems (ES)Replicates decision making processKnowledge
representation describes the way an expert would approach the
problem
1.*
Transaction processing systems automate the handling of data
about business activities or transactions. Management information
systems take the information generated by transaction processing
systems and convert it into aggregated forms meaningful to
managers. Decision support systems are designed to help
organizational decision makers make decisions by providing an
interactive environment that uses data and models. Expert systems
represent attempts to codify and manipulate knowledge rather than
information by mimicking experts in particular knowledge domains.
TPS: large number of transactions (writes to database),
involves/produces small amount of data, used by operatives.MIS:
smaller number of transactions (reads), summaries require larger
amounts of data, used by supervisors or managers.DSS: even smaller
number of transactions (large reads/table scans), larger amounts of
data, used by analysts and managers.ES: smaller amount of data,
rule-based knowledge, e.g. diagnostic systems, commonly used by
operatives.
