P1 outline the principles of
systems analysis
P2 illustrate the stages of a
development lifecycle
M1 discuss the most
appropriate uses of
different development
lifecycle models
P3 explain the benefits of
structured analysis
CASE
CASE stands for Computer Aided Software Engineering that implement
computer facilitate method and tools in software development. It is design on
computer based to help develop systems. CASE is used to secure defect free
software and high quality. CASE ensures a discipline approach and check
pointed as well as help designers to manage, tests and developers to see the
project improvement during development. Types of CASE tools includes analysis
tools, documentation generators, central repository, code generators and
diagramming tools. By using these tools, it allows the analysts to improve
quality of pre-existing system and new systems as well as increase productivity
of the systems that are being designed.
SSADM
SSADM stands for Structured Systems Analysis and Design Methodology that is
a set of industry standards for application designs and system analysis. It is a
methodical approach to the design and analysis of information systems and
developed for government to run projects. SSADM is a methodology that is
based on the waterfall model, it has been used by educational establishment,
CASE tools developers, commercial business and consultants. SSADM combines
diagrams and text in the entire design idea of the systems physical design.
Government run projects by using professional engineering tool because they
believe SSADM will improve the overall quality of the systems design.
Data Flow Diagrams
Data Flow Diagrams is used to as a representation of the flow data graphically
in a business information. It describes that the processes that involved the
system to transfer information or data from the input to the reports generation
and file storage. Data flow diagrams allow users to monitor the process in the
system of the data as well as visual representation of how a system operator,
how it will be implemented and what it accomplishes. DFD can be divided into
physical and logical. The logical DFD describes the flow of data in a system to
perform functionality of organisation whereas the physical DFD describes the
implementation of the logical data flow.
, Key drivers
Key drivers are the factors that affect performance for a business and company.
It is something that has a huge impact on whether companies and business
does great as well as early warning signs for bad results and performance. Key
drivers are reasons that begin the system analysis that lead to the design of the
new systems. The key drivers include legal requirements, need of growth,
increase in productivity and company acquisition. Need of growth means the
expansion of companies for example expanding what the business does and
developing online sakes. Company acquisition means taking control of different
business. However, increase in productivity introduces ways of improving the
quality of the business for example, organizing faster systems that requires
human interaction to operate. Lastly, legal requirements mean a new system
that have to be implemented.
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