The document discusses the phases of the Software Development Life Cycle (SDLC): 1) The phases include requirement analysis, design, coding, testing, deployment, and maintenance. 2) The requirement phase involves documenting business requirements, user requirements, and functional requirements in a Software Requirement Specification. 3) The analysis phase involves identifying requirements, problems, opportunities for improvement, timelines and resources costs. 4) The design phase determines instructions to meet customer requirements and includes high and low level design specifications.

1. SDLC-Software Development Life Cycle

2. Phases or stages of a project from inception through completion and delivery of the final product
and maintenance too.
Software Development Stages
Requirement
Analysis
Design
Coding
Testing
Deployment
Maintenance

3. Requirement Phase
Business Requirement – Represent high level objectives of the organization or customer requesting
the system or product.
General questions – who is going to use the system, how will they use the system, what data should
be input into the system, what data should be output by the system.
User Requirement – Describe the tasks the user must be able to accomplish with the product.
Ex:- Enter user id in the Agent field, Enter the password in the password field, Click Ok.
Functional Requirements – Define the application’s software functionality to enable user to
accomplish their tasks, thereby satisfying the business requirements.
Documented in a Software Requirement Specification (SRS)
Ex – Allow access to authorized user ids and passwords, Deny access to invalid user ids and
passwords.
Analysis Phase
The process of identifying requirements, current problems, opportunities for improvement,
timelines and Resources costs.
Figuring out what your program should do in the best way possible
Investigate the need for possible software automation in the given system.

4. Design Phase
Determine the set of instructions that will lead to a solution that meets the customers
requirements.
Architecture, including hardware and software, software design are all part of the deliverables of a
design phase.
High Level Design Specification – List of modules and a brief description of each, Brief functionality
of each module, interface relationship among modules, dependencies between modules, database
tables identified with key elements.
Low Level Design Specification – Detailed functional logic of the module, all interface details,
completed input and output format of a module.
Coding Phase
The specification from the detailed design phase are converted into programs.
Code is produced from the deliverables of the design phase during implementation, and this is the
longest phase of the software development phase.
Design must be translated into a machine-readable form taking input as SRS. (One by team of
developers, Reviews after every 500 lines of code (code inspection, code walkthrough)).

5. Testing Phase
Finding the hidden defects in developed Product.
During testing, the implementation is tested against the requirements to make sure that the
product is actually solving the needs addressed and gathering during the requirements phase.
Unit, Integration, system and acceptance tests are done during this phase. Unit tests act on a
specific component of the system, while system tests act on the system as a whole.
Deployment and Close Phase
Deploying the product at client side.
Installation and setup of software application at the customer site
Maintenance Phase
Maintaining the software application.
Provide support
Integrate new features requested by customers
Software is maintained due to changes (unexpected values into the system)

6. SDLC Models
Waterfall Model
Incremental/Overlapping Model
Prototyping Model
Spiral Model
V – Model
Rapid Application Model