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Phase 1 - Page 1.1.5 ALOOKZ 5 Phases → SDLC |
| Phase 1 ¦ Phase 2 ¦ Phase 3 ¦ Phase 4 ¦ Phase 5 |
| Phase | Description | Page Number |
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Preliminary Investigation Preliminary investigation is SDLC first phase. In this phase, the system is investigated. The objective of this phase is to conduct an initial analysis and findings of the system. SDLC stands for System Development Life Cycle. It is a step-by-step process. It is an organized way of developing successful systems. It improves the quality of a system. SDLC consists of different phases. Each phase deals with a key issue and produces result called deliverables. The result of one phase becomes the input for the next phase. |
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The most important stage of the SDLC process is planning. It entails determining and defining the project scope in order to develop a complete action plan for the project, as well as identifying the issues that the solution will address. This phase lays out what will happen during the project’s life cycle and decides whether or not it will succeed. At this point, the team structure, time frame, budget, security, and other critical issues should all be considered. |
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System Identification: This phase is used to recognize the need for a new system. The system is identified at this stage. It is very important step. Everything performed in future depends on this definition and identification. System Scope: The scope of the system is also recognized at this stage. A system can be reduced in its scope due to financial, political or time problems. |
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Alternative Solutions: This phase is also used to find out alternate solutions for developing the system. The best available solution must be used. The best way to do this is to interview the concerned people in the organization. It may include the clients, customer, supplier and consultants etc. The competitors can also be an important source to find the best way to develop new system. |
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Feasibility Study: A feasibility study is conducted to find out whether the proposed system is possible, affordable and acceptable for organization. The financial, political, social and time constraints must be considered during this study. It is important to be reasonably sure of the success of proposed system before initiating work on it. A feasibility study is a study to find out whether the proposed system is: → Possible—to build it with the given technology and resources → Affordable—given the time and cost constraints of the organization → Acceptable—for use by the eventual users of the system. |
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Purpose of Feasibility Study: A feasibility study is initiated by an organization when a change is required in the current system. A feasibility study is needed to ascertain the advantages and disadvantages of the new system. Following are the important purposes of feasibility study: → Need Analysis—Determine the need for change within an organization → Cost Benefit Analysis—Study the effect of change on the economics of organization →Technical Feasibility—Evaluate various technologies that can be used to implements the suggested change given the cost and resource constraints of an organization → Legal Feasibility—Evaluate the possible legal procedures to implement the change → Evaluating Alternatives—Evaluate various alternatives to resolve the problems of an organization and recommend the best one A feasibility study is not justified for projects where benefits out-weight costs, technical risks are not high and there are no alternatives. For such projects, conducting a feasibility study will add to unnecessary expenditure of time and money for the study itself. |
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Time of Feasibility Study: A feasibility Study is conducted to understand the issues that face a project before the project is initiated. Ideally, it should be initiated at the beginning of a project. It will be the least inexpensive and most useful to do so. If feasibility study is conducted during analysis phase or later, a considerable time and money would have been spent already on project. The findings of feasibility study may be much difficult to implement. The feasibility can be re-evaluated at various stages of a project. |
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| 1.2 | ||
| 1.3 | ||
| 1.4 | ||
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