preliminary investigation in system analysis and design pdf

Preliminary investigation in system analysis and design pdf

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THE SYSTEMS DEVELOPMENT LIFE CYCLE

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Preliminary investigation in system analysis and design pdf. A person responsible for the analysis of the system is known as analyst. The objective of this phase is to conduct an initial analysis and findings of the system as follows. Based upon the information gathered during the preliminary investigation we recommend a hotel booking system which will propose the following. The analyst may use more than one technique for investigation.

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Systems analysis is the process of examining a business situation for the purpose of developing a system solution to a problem or devising improvements to such a situation. The project proposal is the attempt to respond to or take advantage of a particular situation and is an essential element for correctly launching the system analysis. Although there are no hard and fast rules as to the form and content of the project proposal, the proposal should address the following points:. System projects that are to be shared by a number of departments and users are usually approved by a committee rather than an individual. A project proposal is submitted to a committee that determines the merits of the proposal and decides whether or not to approve it. The committee is made up of people from various functional areas of the organization who have an interest in the operation and information of the proposed system. The systems development life cycle SDLC describes a set of steps that produces a new computer information system.

THE SYSTEMS DEVELOPMENT LIFE CYCLE

In systems engineering , information systems and software engineering , the software development life cycle SDLC , also referred to as the application development life-cycle , is a process for planning, creating, testing, and deploying an information system. A systems development life cycle is composed of a number of clearly defined and distinct work phases which are used by systems engineers and systems developers to plan for, design, build, test, and deliver information systems. Like anything that is manufactured on an assembly line, an SDLC aims to produce high-quality systems that meet or exceed customer expectations, based on customer requirements, by delivering systems which move through each clearly defined phase, within scheduled time frames and cost estimates. To manage this level of complexity, a number of SDLC models or methodologies have been created, such as waterfall , spiral , Agile software development , rapid prototyping , incremental , and synchronize and stabilize. SDLC can be described along a spectrum of agile to iterative to sequential methodologies. Agile methodologies, such as XP and Scrum , focus on lightweight processes which allow for rapid changes without necessarily following the pattern of SDLC approach along the development cycle. Iterative methodologies, such as Rational Unified Process and dynamic systems development method , focus on limited project scope and expanding or improving products by multiple iterations.


PDF | A preliminary investigation is a problem-solving procedure. of Ishikawa diagrams in the preliminary analysis phase through a series of [2] M Grimsley and A Meehan e-Government information systems: Evaluation-led design for.


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Systems development is systematic process which includes phases such as planning, analysis, design, deployment, and maintenance. It is a process of collecting and interpreting facts, identifying the problems, and decomposition of a system into its components. System analysis is conducted for the purpose of studying a system or its parts in order to identify its objectives. It is a problem solving technique that improves the system and ensures that all the components of the system work efficiently to accomplish their purpose. It is a process of planning a new business system or replacing an existing system by defining its components or modules to satisfy the specific requirements.

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Preliminary Investigation basically refers to the collection of information that guides the management of an organization to evaluate the merits and demerits of the project request and make an informed judgment about the feasibility of the proposed system. This sort of investigation provides us with a through picture of the kind of software and hardware requirements which are most feasible for the system, plus the environment in which the entire project has to be installed and made operational. They were quite effective in guiding us towards visualizing the features that were needed to be put together in the system and the required output which had to be generated once the system became functional. These specifications provided to us by the organization showed how the new system should look like; it helped us in understanding the basic structure of the application which we were supposed to develop. Another technique utilized by us to gain information about the project was to visit the client site where the system had to be installed.

Another view sees systems analysis as a problem-solving technique that decomposes a system into its component pieces for the purpose of the studying how well those component parts work and interact to accomplish their purpose. Every synthesis builds upon the results of a preceding analysis, and every analysis requires a subsequent synthesis in order to verify and correct its results. It is also "an explicit formal inquiry carried out to help a decision maker identify a better course of action and make a better decision than she might otherwise have made. The terms analysis and synthesis stem from Greek, meaning "to take apart" and "to put together," respectively. These terms are used in many scientific disciplines, from mathematics and logic to economics and psychology, to denote similar investigative procedures. Analysis is defined as "the procedure by which we break down an intellectual or substantial whole into parts," while synthesis means "the procedure by which we combine separate elements or components in order to form a coherent whole.

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