What are the various models of information systems? Discuss the stages in a System Development Life Cycle (SDLC).

Models of Information Systems:

Information systems can be categorized into various models based on their functionality, scope, and purpose. These models help in understanding the structure and operation of different types of information systems. Some of the common models of information systems include:

1. Transaction Processing System (TPS): TPS is designed to process routine transactions efficiently. It focuses on capturing, storing, processing, and retrieving data related to business transactions. TPS ensures data integrity and supports operational-level decision-making.

2. Management Information System (MIS): MIS provides managers with information to support decision-making at the operational, tactical, and strategic levels. It collects data from various sources, processes it into meaningful information, and presents it in reports and dashboards.

3. Decision Support System (DSS): DSS helps managers make decisions by providing interactive tools and access to databases and models. It analyzes data, performs simulations, and generates alternative scenarios to support semi-structured and unstructured decision-making.

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