System
Development Life Cycle
An effective System Development Life Cycle (SDLC) should result in
a high quality system that meets customer expectations, reaches completion
within time and cost evaluations, and works effectively and efficiently in the
current and planned Information Technology infrastructure.
System Development Life Cycle (SDLC) is a conceptual model which
includes policies and procedures for developing or altering systems throughout
their life cycles.
SDLC is used by analysts to develop an information system. SDLC
includes the following activities −
- requirements
- design
- implementation
- testing
- deployment
- operations
- maintenance
Phases of SDLC
Systems Development Life Cycle is a systematic approach which
explicitly breaks down the work into phases that are required to implement
either new or modified Information System.
Feasibility
Study or Planning
· Define the
problem and scope of existing system.
· Overview the
new system and determine its objectives.
· Confirm project
feasibility and produce the project Schedule.
· During this
phase, threats, constraints, integration and security of system are also
considered.
· A feasibility
report for the entire project is created at the end of this phase.
Analysis
and Specification
· Gather,
analyze, and validate the information.
· Define the
requirements and prototypes for new system.
· Evaluate the
alternatives and prioritize the requirements.
· Examine the
information needs of end-user and enhances the system goal.
· A Software
Requirement Specification (SRS) document, which specifies the software,
hardware, functional, and network requirements of the system is prepared at the
end of this phase.
System
Design
· Includes the
design of application, network, databases, user interfaces, and system
interfaces.
· Transform the
SRS document into logical structure, which contains detailed and complete set
of specifications that can be implemented in a programming language.
· Create a
contingency, training, maintenance, and operation plan.
· Review the
proposed design. Ensure that the final design must meet the requirements stated
in SRS document.
· Finally,
prepare a design document which will be used during next phases.
Implementation
· Implement the
design into source code through coding.
· Combine all the
modules together into training environment that detects errors and defects.
· A test report
which contains errors is prepared through test plan that includes test related
tasks such as test case generation, testing criteria, and resource allocation
for testing.
· Integrate the
information system into its environment and install the new system.
Maintenance/Support
· Include all the
activities such as phone support or physical on-site support for users that is
required once the system is installing.
· Implement the
changes that software might undergo over a period of time, or implement any new
requirements after the software is deployed at the customer location.
· It also
includes handling the residual errors and resolve any issues that may exist in
the system even after the testing phase.
· Maintenance and
support may be needed for a longer time for large systems and for a short time
for smaller systems.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
System Analysis & Design.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
#systemanalysisanddesign #systemanalysis #systemdesign
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
BCA, SAD(System Analysis & Design), Allrounder Sita Ram Sahu
Thanks for coming my blog.
No comments:
Post a Comment