Preliminary Investigation In System Analysis And Design Pdf
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- Introduction to Systems Analysis and Design
- Unit 2 System Analysis and Design
- Preliminary Investigation In System Analysis And Design Pdf
- IFSM 461 Preliminary Investigation Report : Systems Analysis and Design
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:.
Introduction to Systems Analysis and Design
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 SDLC is a problem-solving process. Each step in the process delineates a number of activities.
Performing these activities in the order prescribed by the SDLC will bring about a solution to the business situation. The SDLC process consists of the following phases:. Each phase has a distinct set of unique development activities.
Some of these activities may span more than one phase. The management activity tends to be similar among all phases.
The SDLC is not standardized and may be unique to a given organization. In other words, the names and number of phases may differ from one SDLC to the next. However, the SDLC discussed here is, to a large extent, representative of what is typically adopted by organizations.
At each phase certain activities are performed; the results of these activities are documented in a report identified with that phase. Management reviews the results of the phase and determines if the project is to proceed to the next phase.
The first two phases of the SDLC process constitute the systems-analysis function of a business situation. The first phase of the systems development life cycle is preliminary investigation. Due to limited resources an organization can undertake only those projects that are critical to its mission, goals, and objectives.
Therefore, the goal of preliminary investigation is simply to identify and select a project for development from among all the projects that are under consideration.
Organizations may differ in how they identify and select projects for development. Some organizations have a formal planning process that is carried out by a steering committee or a task force made up of senior managers. Such a committee or task force identifies and assesses possible computer information systems projects that the organization should consider for development. Other organizations operate in an ad hoc fashion to identify and select potential projects.
Regardless of the method used, and after all potential projects have been identified, only those projects with the greatest promise for the well-being of the organization, given available resources, are selected for development. The objective of the systems-investigation phase is to answer the following questions: What is the business problem?
Is it a problem or an opportunity? What are the major causes of the problem? Can the problem be solved by improving the current information system? Is a new information system needed? Is this a feasible information system solution to this problem?
The preliminary-investigation phase sets the stage for gathering information about the current problem and the existing information system. This information is then used in studying the feasibility of possible information systems solutions. It is important to note that the source of the project has a great deal to do with its scope and content.
For example, a project that is proposed by top management usually has a broad strategic focus. A steering committee proposal might have a focus that covers a cross-function of the organization. Projects advanced by an individual, a group of individuals, or a department may have a narrower focus.
A variety of criteria can be used within an organization for classifying and ranking potential projects. For planning purposes, the systems analyst—with the assistance of the stakeholders of the proposed project—collects information about the project. This information has a broad range and focuses on understanding the project size, costs, and potential benefits. This information is then analyzed and summarized in a document that is then used in conjunction with documents about other projects in order to review and compare all possible projects.
Each of these possible projects is assessed using multiple criteria to determine feasibility. The feasibility study investigates the problem and the information needs of the stakeholders.
It seeks to determine the resources required to provide an information systems solution, the cost and benefits of such a solution, and the feasibility of such a solution. The analyst conducting the study gathers information using a variety of methods, the most popular of which are:. The goal of the feasibility study is to consider alternative information systems solutions, evaluate their feasibility, and propose the alternative most suitable to the organization.
The feasibility of a proposed solution is evaluated in terms of its components. These components are:. This phase is an in-depth analysis of the stakeholders' information needs. This leads to defining the requirements of the computer information system.
These requirements are then incorporated into the design phase. Many of the activities performed in the requirements definition phase are an extension of those used in the preliminary investigation phase. The main goal of the analyst is to identify what should be done, not how to do it.
The following is a discussion of the activities involved in requirements definition. Analysis of the information needs of the stakeholders is an important first step in determining the requirements of the new system.
It is essential that the analyst understands the environment in which the new system will operate. Understanding the environment means knowing enough about the management of the organization, its structure, its people, its business, and the current information systems to ensure that the new system will be appropriate. A comprehensive and detailed analysis of the current system is essential to developing a quality, new information system. The analyst should understand and document how the current system uses hardware, software, and people to accept and manage input data and to convert such data into information suitable for decision making.
The documentation should be detailed and complete. For example, the analyst should assess the quality of input and output activities that form the user's interface. In addition, the volume and timing of such activities may be documented.
Functional requirements include the necessary hardware and software configurations along with the appropriate human resources. Specific functional requirements often include the following:. The analysis team, at the end of this phase, produces a document containing the functional requirements of the new computer information system. Additionally, the document contains preliminary schedules and a budget for the next phase.
The task force or committee responsible for the project studies the document for the purpose of approving or not approving the work of the analysis team. In addition, the analysis team provides the committee with a demonstration. In essence, the analysis team walks the committee members, step by step, through the requirements definition phase.
If the committee approves this phase, then the analysis team is funded and given the go-ahead to proceed to the next phase. However, if the committee does not approve this phase, then either the project is canceled or, after appropriate modifications, the analysis team resubmits a new document to the committee.
A walk-through starts with a description of the project. From this point, the analysts delineate a set of well-defined goals, objectives, and benefits of the computer information system. Following that, the budgets and staffing requirements are articulated and the plans are shared with the committee.
Specific, planned tasks are compared to actual accomplishments, and deviations, if any, are noted and accounted for. The plans for asset protection and business control are reviewed with the committee members. Finally, the analysts seek the committee's approval of the objectives, plans, time table, and budget for the next phase—systems design. In summary, systems analysis is an essential starting point in the development of computer information systems projects.
An organization generally follows a development pattern set up to meet its needs. Regardless of which methodology an organization uses, the objective of systems analysis is to fully understand the current environment and future requirements of a computer information systems project. Badie N. Kendall, Kenneth, and Julia Kendall. Systems Analysis and Design. McLeod, Raymond, Jr. Management Information Systems. Essentials of Systems Analysis and Design.
Toggle navigation. Photo by: kentoh. Other articles you might like:. Also read article about Systems Analysis from Wikipedia. User Contributions: 1. Add information about the functional and non functional requirement of a system. This is an excellent resource for new and experienced analysts to carry out analysis in a structured method.
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Unit 2 System Analysis and Design
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. System analysis is used in every field where something is developed.
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. To enable online booking via the internet. Define the project scope and constraintslimitation or restriction along with defining the scope of the project you need to identify any constraints on the system.
PDF | A preliminary investigation is a problem-solving procedure. of Ishikawa diagrams in the preliminary analysis phase through a series of  M Grimsley and A Meehan e-Government information systems: Evaluation-led design for.
Preliminary Investigation In System Analysis And Design Pdf
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.
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IFSM 461 Preliminary Investigation Report : Systems Analysis and Design
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.
Not a MyNAP member yet? Register for a free account to start saving and receiving special member only perks. Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book. It cov- ers preparing and evaluating investigation requests, deciding to proceed or not to proceed with an investigation based on the request, initiating a forensic investigation, undertaking a background study, identifying issues of interest and prepar- ing objectives to address them, collecting relevant informa- tion, determining whether a forensic evaluation is justified, preparing a preliminary investigation report, and recording the decision to proceed or not to proceed with a forensic investigation. The requestor: 1.
Detailed investigation information gathering data analysis. What is preliminary investigation. Systems Analysis Design Community College Of.
THE SYSTEMS DEVELOPMENT LIFE CYCLE
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. Before planning, you need to understand the old system thoroughly and determine how computers can best be used in order to operate efficiently. The word System is derived from Greek word Systema, which means an organized relationship between any set of components to achieve some common cause or objective.