System Development Method
Structure analysis uses a concept called the systems development life cycle (SDLC) to plan and manage the system development process. The SDLC model contains the following steps:
1. System Planning.
2. System Analysis.
3. System Design.
4. System Implementation.
5. System Operation, Support, and Security.
The system planning phase often begins with a proper request to the IT department, known as a system request, which describes issues or desired adjustments in an information system or a business process.
The aim of this phase is to carry out a preliminary investigation to determine the character and scope of the enterprise alternative or drawback. The preliminary investigation is an essential step as a result that will have an effect on your entire development process.
A key part of the preliminary investigation is a feasibility examine that opinions anticipated prices and advantages and recommends a plan of action based mostly on operational, technical, financial, economic, and time elements.
The aim of the system evaluation section is to construct a logical model of the brand new system. Step one is requirement modeling, the place you examine business processes and document what the brand new system should do.
Requirement modeling continues the investigation that started throughout the system planning section. To grasp the system, you carry out fact-finding utilizing methods reminiscent of the interview, surveys, document evaluation, information and process models, and object models.
The aim of the system design section is to create a blueprint that can fulfill all documented requirement for the system. At this stage, you design the person interface and determine all crucial output, enter, and processes
During the systems design section, you additionally decide the application architecture, which exhibits programmers methods to remodel the logical design into program modules and code.
The results of this are documented within the system design specification and introduced to administration and customers for evaluation and approval. Management and user involvement is essential to keep away from any misunderstanding about what the brand new system will do, how it will do it, and what it will cost.
Through the system implementation section, the brand new system is constructed-programs are written, examined, and documented, and the system is installed. The target of the system implementation section is to ship a very functioning and documented data system.
On the conclusion of this section, the system is prepared to be used. The system implementation section additionally contains an assessment, called a system evaluation, to find out whether or not the system operates correctly and if costs and advantages are within expectations.
System Operation, Support, and Security
During the system operation, support, and security phase, the IT employees maintain, enhances, and protects the system. The target throughout this section is to maximize return on the IT investment.
A well-designed system will be secure, reliable, maintainable, and scalable. Information system needs to be updated significantly or replaced after several years of operation.