P1 : Outline The Principles Of Systems Analysis

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Contents P1 – Outline the principles of systems analysis 2 P2 – Illustrate the stages of a development life cycle 3 P3 - Explain the benefits of structured analysis 4 M1 - Discuss the most appropriate uses of different development lifecycle models 5 P1 – Outline the principles of systems analysis System Analysis is the study where detailed information about the components and requirements of a system, the information needs of an organisation, the characteristics and current components of the systems and the user functional requirements of the systems that is proposed system. The Waterfall life cycle model The waterfall lifecycle was the first process model to be introduced and widely known. It is also known as the linear-sequential…show more content…
An Example of entities in retail context could be Item ID, Colour, Size and Price. Data Flow Modelling – This is the process of modelling and recording how data flows around a system. A Data Flow Model is made up of connected Data Flow Diagrams (DFD) which are supported by appropriate documentation. DFDs represent the processes and functions within a system (activates that transform data from one form to another), data stores (file storage, external entities (things that send data into a system or receive data from a system) and finally data flows (show the flow of data around the system). Entity Event Modelling – This is the process of identifying, displaying and documenting the business events that affect each entity and the sequence in which these events occur. An Entity/Event Model is made up of a set of Entity Life Histories (one for each entity) and appropriate supporting documentation. Key drivers for staring a new project: Given that the development of new systems can be fraught with problems and delays, there are many factors that drive organisations to develop new systems. The most important drives come directly from the companies needs and are often not related to technology, but however to technological solutions, these include: • A need to reduce staff costs - having a new system that can carry out the same job as employees has become a popular drive for a new system in an organisation, which
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