ITM 311 Chapter Notes - Chapter 1-2: Systems Development Life Cycle, Decision Support System, Functional Decomposition
13 Sep 2016
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Receiving data from the outside, any interaction with outside is interaction with the environment of others. All components work together to achieve a purpose. Info systems analysis & design (or systems development) Major goal of sa&d is to improve organizational systems. Process of developing and maintaining an information system: transaction processing system- Automates handling of data in a manual process. Handles day-to-day activities (point-of-sale; reservation: management information system- Takes raw tps data as input (sales report, bookings info) Converts data into meaningful information for management: decision support system. Typically, interactive in nature (several scenarios, what-ifs, such as ifps: prototyping. Revise / enhance / ramp up the prototype. Systems development methodology created to radically decrease the time needed to design and implement information systems. Makes sense when time is critical: erp. Allows the system analyst to: break up the system into small manageable, and understandable subsystems. o.
