This is a conceptual model used in Project Management that describes the stages involved in initial feasibility study through maintenance of the complete application.
System Development Life Cycle :
Nowadays, systems are so complex and big that teams of architects, analysts, programmers, testers and users must work together to create the millions of lines of custom-written code that drive our enterprises.
To manage this, a number of system development life cycle (SDLC) models have been created like waterfall, fountain, spiral, build and fix, rapid prototyping, incremental, and synchronize and stabilize. Depending on the requirements, scope, feasibility, time, risk and money, we chose suitable software development methods.
System Development Methodologies :
Different types of system development methodologies are used in designing information system. Some system groups recommend the Centralized data processing system while others may go in for distributed data processing system. The distributed processing systems involve number of computers located remotely in the branches/departments of the organization. and in a Centralized data processing, one or more centralized computers are used for processing and the retrieval of information is done from them. The client/server technologies are also gaining popularity these days.
The Business Rules Approach to Systems Development :
In most traditional software development life cycles, analysis is focused on gathering system requirements. A business rules approach is a different way of thinking about the analysis process. Rather than focusing on system requirements, the analysis process is refocused on business rules. Instead of asking users what they want their system to do, they are asked about how their business or organization works. The business rules approach is not something new, it is simply a better, more precise way of describing excellent systems analysis.
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