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Sys Analysis Study Guide

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1- What is object-oriented analysis, and how does it differ from structured analysis?

Object Oriented analysis is “the examination of a problem by modeling it as a group of interacting objects. An object is defined by its class, data elements and behavior. For example; in an order processing system, an invoice is a class, and printing, viewing and totaling are examples of its behavior. Objects (individual invoices) inherit this behavior and combine it with their own data elements.” ( (The Computer Language Company, 1981-2012) Object-oriented analysis (OOA) applies object-modeling techniques to analyze the functional requirements for a system.
“Analysis is done by identifying the use cases and detailing a flow of events for each. Also, an initial set of functional test cases is specified, to serve as a vehicle for checking that the implementation is complete and basically correct. Analysis culminates in identifying classes implied by the use cases, and documenting them using an Analysis Class Diagram.” (Russell C. Bjork Professor of Computer Science, 2004)
The difference is in object oriented analysis the data is combined in a process that acts on the data in the object whereas structured analysis treats the process and the data as separate components.

2- Describe the phases of the system development life cycle, and compare the SDLC waterfall model with the spiral model?
“The Systems Development Life Cycle (SDLC) is a conceptual model used in project management that describes the stages involved in an information system development project from an initial feasibility study through maintenance of the completed application. Various SDLC methodologies have been developed to guide the processes involved including the waterfall model (the original SDLC method), rapid application development (RAD), joint application development (JAD), the fountain model and the

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