Answer
System development can generally be thought of having two major components: systems analysis and systems design.In System Analysis more emphasis is given to understanding the details of an existing system or a proposed one and then deciding whether the proposed system is desirable or not and whether the existing system needs improvements. Thus, system analysis is the process of investigating a system, identifying problems, and using the information to recommend improvements to the system.
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"System" in system analysis and system design can mean any system whatsoever. Examples include computer systems, human processes, businesses, and the likes. It is any process or entity that can be analyzed or designed.
The Monster theorem is used to study analysis and design of algorithm. The study of analysis and design of algorithm is very important as it helps the learners develop the ability to analyze the complexity of the programs.
The objectives are to determine specific needs of a system and ultimately facilitate a comprehensive design around these needs.
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describe different life cycle models and explain the contribution of the system analysis and design within them;
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discuss various approaches to systems analysis and design and explain their strengths and weaknesses;
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evaluate the tools and techniques of systems analysis and design that may be used in a given context;
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use appropriate methods and techniques to produce an analysis of a given scenario;
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use appropriate methods and techniques to produce a system design for an given scenario;
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provide suitable documentation for systems analysis and design activities
Systems analysis and design, as performed by systems analysts, seeks to understand
what humans need to analyze data input or data flow systematically, process or
transform data, store data, and output information in the context of a particular
business. Furthermore, systems analysis and design is used to analyze, design,
and implement improvements in the support of users and the functioning of
businesses that can be accomplished through the use of computerized information systems.
Installing a system without proper planning leads to great user dissatisfaction
and frequently causes the system to fall into disuse. Systems analysis and design
lends structure to the analysis and design of information systems, a costly endeavor
that might otherwise have been done in a haphazard way. It can be thought of as a
series of processes systematically undertaken to improve a business through the
use of computerized information systems. Systems analysis and design involves
working with current and eventual users of information systems to support them
in working with technologies in an organizational setting.
User involvement throughout the systems project is critical to the successful
development of computerized information systems. Systems analysts, whose roles
in the organization are discussed next, are the other essential component in developing useful information systems.
Users are moving to the forefront as software development teams become
more international in their composition. This means that there is more emphasis
on working with software users; on performing analysis of their business, problems, and objectives; and on communicating the analysis and design of the planned
system to all involved.
New technologies also are driving the need for systems analysis. Ajax
(Asynchronous JavaScript and XML) is not a new programming language, but a
technique that uses existing languages to make Web pages function more like a traditional desktop application program. Building and redesigning Web pages that
utilize Ajax technologies will be a task facing analysts. New programming languages, such as Ruby on Rails, which is a combination programming language and
code generator for creating Web applications, will require more analysis
Systems analysis is used when designing a new computer system to replace a manual system or an older computer system. In order to design it, it is essential to know how the current system works, so that the new system will do all that the current system does and possibly find ways of improving it further.
Without understanding those fields a programmer can't communicate with the systems engineers and design engineers and will likely write incorrect code that someone will have to fix.
system analysis and design
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One example of a system and sub system in system analysis and design is an organization (system) with interrelated department (sub system). Another example would be a computer (system) and all of its components (subsystem).
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SDLC is software development life cycle and system analysis & design is one of the step in the cycle. Other steps being: 1. Requirement analysis 2. System analysis & design 3. Coding 4. Testing 5. Installation & maintenance