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Why many system designer believe that data modelling is the most important part of the system development process?
Wiki User
∙ 12y ago
The characteristics of data captured during data modeling are crucial in the designof databases, programs, and other system components. Facts and rules that arecaptured during this process are essential in assuring data integrity in aninformation system.b.
Data, rather than processes, are the most important aspects of many moderninformation systems and hence, require a central role in structuring systemrequirements.c.
Data tend to be more stable than the business processes that use the data. Thus,an information system that is based on a data orientation should have a longeruseful life than one based on a process orientation.
Wiki User
∙ 12y ago
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What the differentiate or different stages of software development life cycle?
The Software development process is composed of many activities, notably the following. * Conception: Establishing a case model for the development of the software. * Requirements Analysis: Extracting the requirements of a desired software product is the first task in creating it. While customers probably believe they know what the software is to do, it is important to recognize incomplete, ambiguous or contradictory requirements. * Specification: Specification is the task of precisely describing the software to be written. What functions it should have, the user interface, and any other requirements. * Software architecture: The architecture of a software system refers to an abstract representation of that system. Architecture involves making sure the software system will meet the requirements of the product, as well as ensuring that future requirements can be addressed. The architecture step also addresses interfaces between the software system and other software products, as well as the underlying hardware and the operating system platform. * Implementation: Converting a design to functional code. * Testing: Testing all aspects of the software's functionality. * Documentation: An important task is documenting the internal design of software for the purpose of future maintenance and enhancement. * Software Training and Support: Users will have lots of questions and software problems which leads to the next phase of software. * Maintenance: Maintaining and enhancing software to cope with newly discovered problems or new requirements.
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