Software Development Life Cycle

Software Development Life Cycle

A Software Development Lifecycle (SDLC) is a framework that defines the steps required in each phase of software development. Provides detailed plans for building, deploying, and maintaining software. Delivering high-quality software that meets or exceeds customer expectations while staying within budget and schedule is the aim of the SDLC.

In this blog, we will study the SDLC process and how its works and what are its phases. Also, take a look at some of the popular SDLC models.

SDLC Phases

The SDLC consists of the following phases:

Planning and Requirement Analysis

At this stage, all relevant information is collected from the customer in order to develop the product in line with the customer's expectations. Any ambiguity should first be clarified at this stage.

It is conducted by senior members of the team with input from clients, sales, market research, and industry experts. This information is used to plan the basic project approach and to conduct product feasibility studies in the areas of economics, operations, and technology.

Once the requirements gathering is complete, an analysis is performed to verify the feasibility of product development. If there are any questions, a conference call will be set up for further discussion.

Once the necessities are surely understood, an SRS (Software Requirements Specification) report is created. This report has to be nicely understood by the developer and reviewed through the client for destiny reference.

Defining Requirements

Once the necessities evaluation is complete, the following step is to honestly outline and record the product necessities for approval via way of means of the consumer or marketplace analyst.

This is accomplished through an 'SRS' (Software Requirements Specification) document that contains all the product requirements that need to be created and developed during the lifecycle of the project.


During the layout stage, software program builders examine the necessities and decide the exceptional answer for constructing the software program. For example, you might consider integrating existing modules, deciding on technology, identifying development tools, and so on. They consider how to best integrate the new software into the company's existing IT infrastructure.

The design approach clearly defines the representation of communication and data flow between all architectural modules of the product and with external and third-party modules (if any). The inner shape of all modules of the proposed structure needs to be honestly described withinside the DDS right all the way down to the smallest detail.

Implementation or Coding

Implementation/coding starts as soon as the developer receives the design document.

During the implementation phase, the development team programs the product. Analyze the requirements to identify small coding tasks that can be performed on a daily basis to achieve revenue.

Software design is translated into source code. In this phase, all components of the software are implemented.


Once coding is complete and the module is released for testing, testing begins. At this stage, the developed software is thoroughly tested and any defects identified are assigned to the developers to fix. Development teams combine automated and manual testing to check software for errors. The quality analysis includes checking the software for errors and ensuring that it meets customer requirements.

During this phase unit tests, integration tests, system tests, and acceptance tests are performed.


Once the software is certified and no bugs or errors are found, it is deployed.

In order for users to use the product, it must be deployed into a production environment. However, many organizations choose to move their products through different deployment environments, such as testing and staging environments. Maintenance begins once the software is deployed.


During the maintenance phase, the team's primary goals are troubleshooting, fixing customer issues, and managing software changes. Additionally, the team monitors system-wide performance, security, and user experience to identify new opportunities to improve existing software.

Sometimes there are real problems and requirements to solve as soon as the customer starts using the developed system. This process of maintaining the developed product is called maintenance.

Benefits of SDLC

● Shows the basic plan for software development.

● Improving customer relationships.

● Cost-efficient

● Have a temporary effect

● Risks in project implementation are minimized

● This is a project tracking and control mechanism.

Drawbacks of SDLC

● Projects can take longer and cost more if planning is not done properly.

● If your code contains many errors, fixing them can take a long time and you may miss the deadline.

SDLC Models:

Waterfall Model

The waterfall version changed into the primary system version introduced. This is also known as the linear sequential lifecycle model. Very easy to understand and use. In a waterfall model, every section has to be finished earlier than the following section can begin, and levels do now no longer overlap.

In this model, the output of 1 section will become the entry of the subsequent section. The development of the next phase will not start until the previous phase is completed.

This model was once very popular but is no longer used. However, it's miles very essential due to the fact all different software program improvement lifecycle fashions are primarily based totally on the traditional waterfall model.

Spiral Model

The spiral model is one of the most important life cycle models for software development and supports risk management.

Using a spiral model, the software is developed in a series of incremental releases. In early iterations, additional versions may be paper models or prototypes. Subsequent iterations produce a more complete version of the built system. Software projects repeat these phases in iterations called spirals.

Agile Model

The Agile model divides tasks into time slots to deliver specific functionality to releases. Each construct is incremental in phrases of capability and the very last construct carries all attributes. Dividing the entire project into smaller pieces minimizes project risk and overall project duration. Agile models are more efficient than other process models because they are iterative and incremental.

RAD (Rapid Application Development) Model

In the RAD model, much less interest is paid to making plans, and extra precedence is given to improvement tasks. The aim is to develop software in a short period of time. RAD projects follow an iterative and incremental model consisting of small development teams, subject matter experts, customer representatives, and other IT resources, each developing a component or prototype. The numerous stages of RAD encompass necessities gathering, evaluation and planning, design, engineering or construction, and the very last deployment.

V-shaped Model

The V-model is an SDLC model (software development lifecycle) that systematically and visually maps the software development process. The V model is an extension of the waterfall model, where software development and testing are performed sequentially. This is called a validation model or verification model. This is a surprisingly disciplined version and the subsequent segment will best begin after the preceding segment is completed. Follow a sequential design process that follows a waterfall model. Device testing is planned in parallel with the corresponding development situation.


The Software Development Life Cycle (SDLC) serves as a guiding framework for successful software development.Software development teams may make sure that projects are carried out efficiently and effectively by adhering to the separate phases of requirements collecting, design, implementation, testing, deployment, and maintenance.

By leveraging the SDLC's principles, methodologies, and tools, organizations can enhance collaboration, meet project deadlines, and deliver high-quality software products that meet the ever-evolving needs of their stakeholders.