Discuss the Different Phases and Models of the Software Development Life Cycle (SDLC)

The Software Development Life Cycle (SDLC) is a method used for defining the different phases and operations involved in software creation. By segmenting a project into smaller units of tasks, teams can efficiently manage and monitor its progress, ensuring its accurate completion. This methodology empowers teams to generate superior software solutions that meet and surpass the expectations of customers.

SDLC, also known as the Software Development Life Cycle, is a systematic process used for designing and sustaining software. The seven phases of this approach include planning, requirements gathering, prototyping and design, software development, testing, deployment, and maintenance. However, depending on the unique needs of a project, some of these stages can be merged, divided or even skipped altogether.

This article will delve into the various frameworks and procedures that constitute the SDLC.

Put differently, could you explain the life cycle of software development?

In the field of software engineering, SDLC (or Software Development Life Cycle), refers to the process of creating, testing, and launching information systems. By dividing software development into manageable stages, technical teams can detect key areas for improvement, leading to enhanced productivity for businesses.

At the core of SDLC (or Software Development Life Cycle), lies the objective of generating a top-quality product that meets and exceeds the expectations of the customer. This approach also uncovers inefficiencies and cost redundancies, aids in their elimination, and assists organizations and teams in reducing costs and accelerating the software release process.

Outlined below are the principal benefits and perks of SDLC:

  • This framework can serve as a foundation for planning, scheduling, and estimating.
  • SDLC can empower businesses to bolster their relationships with customers.
  • SDLC can assist technical teams in mitigating project risks.
  • SDLC enables teams to anticipate project requirements during the planning phase.
  • SDLC enhances transparency throughout the software development cycle.
  • SDLC can help companies cut costs.
  • SDLC serves as a valuable instrument in tracking and overseeing project advancement.
  • SDLC facilitates faster software development.

What is the Number of Steps in SDLC?

IT departments have a range of responsibilities to fulfill across the seven stages of the Software Development Life Cycle (SDLC). The specific procedures may vary based on the chosen SDLC model.

There are seven steps in the Software Development Life Cycle (SDLC):


During this initial stage, project managers work on establishing the project’s objectives and goals. If the program is being created for a client, the project manager arranges another meeting to discuss the product, its purpose, and the desired outcomes with them. The team strives to acquire as much information as possible about the product from the client.

During the planning stage, leaders evaluate the project’s parameters. This entails scrutinizing the time and monetary commitment, as well as the team members involved. These parameters establish a structure for the project and aim to guarantee that the intended outcomes are accomplished within the allotted timeline.

Indispensable Prerequisites

During the initial phase of the Software Development Life Cycle (SDLC), the project manager performs a requirement analysis to identify the necessary features for the product. All aspects required to achieve the desired outcome are taken into account, including the purpose and resources necessary for the project’s development. For instance, the hardware of a cleaning robot must be designed before developing the software that will control it. Therefore, it is crucial that we progress to Stage 2 of the SDLC.

During this second stage, it is crucial that all team members comprehend their duties and the extent of the work that needs to be done, while also establishing the end product’s objectives.

3D Modelling and Prototype Development

Upon gaining a thorough comprehension of the first two stages, developers can initiate software design. The app’s future functionality is established during the design phase. At this stage, the team members determine the language, user interface design, and supporting documentation to be employed moving forward. The developers address some of the most critical concerns during this stage.

  • Architecture: Teams decide whether to adhere to a pre-defined model or implement any pertinent best practices.
  • Teams are accountable for selecting the user interface (UI) that the platform’s end users will be utilizing. To ensure maximum user engagement, developers must prioritize simplicity of use. Consequently, the success of the platform is heavily dependent on the careful formulation of these procedures.
  • To guarantee the app’s safety, developers must delineate their strategies for achieving this. This must involve an evaluation of password security, as well as implementing measures to ensure the protection of all data stored within the app.
  • The programming language(s) and problem-solving methodologies to be employed must be clearly stipulated.

The prototyping process is also part of this stage. A prototype is a functioning model of an app’s essential features and design. Customers can gain insight into the final product by examining an app prototype; this is where they can determine whether their original idea needs to be revised and make any necessary adjustments.


During this phase, programmers initiate work on the application. For small-scale projects, a single developer will be in charge of coding, whereas larger projects may necessitate a team of developers. It is crucial to establish clear coding principles before beginning development. In addition, the foundation for the entire system should be laid out at this juncture.

Teams can undertake this phase using either Agile short bursts or the Waterfall method over an extended period, depending on their preferred working style. To guarantee the application’s efficacy, the majority of the team’s time should be dedicated to this stage.


Throughout each stage of the Software Development Life Cycle (SDLC), the significance of each stage cannot be overstressed. Nevertheless, it is during testing that the developers anxiously anticipate the outcomes of their diligent efforts. This phase comprises several testing procedures, including code quality, unit, integration, performance, and security.

During this phase, developers will resolve any issues that were discovered during testing. Due to the potentially significant consequences of releasing an unreliable program, testing must be conducted with the utmost care and attention. The objective is for users to be exceedingly pleased with the new app, resulting in repeat usage and recommendations to their peers. Automated tests can be utilized to ensure that all tests are completed and none are missed.


After completing all testing and verifying that the system is free of errors, the deployment process can commence. At this stage, the technical support team is involved in providing feedback from customers. The team guarantees that all software is secure and up-to-date.

In larger teams, this step is typically automated, which means team members may not be aware of it. However, for startups and smaller enterprises, this process must be carried out manually, taking into consideration the team’s capacities and the intricacy of the application they are developing.


When an application has reached this phase of the Software Development Lifecycle, it has been fully developed and is prepared for deployment. It is vital, however, to detect any possible flaws or errors before releasing the app. The development team should be ready to solve any problems that users may encounter while using the application. This stage also presents an opportunity to improve the app by adding new features through updates.

The Significance of SDLC Models and Techniques

The Software Development Life Cycle (SDLC) is an ongoing process utilized in software creation. While the processes involved are the same, each team has its own unique methodology and procedures. Contrary to popular belief, there is no single model. Some of the most commonly employed SDLC approaches include Waterfall, V-Shaped, Iterative, Spiral, Big Bang, Prototype, and Agile.

The Waterfall Model

The ‘Waterfall’ approach was the first Software Development Life Cycle (SDLC) model. It divides the project into distinct stages, each with clearly defined objectives and goals. The model is then pursued in a sequential manner, with the outcomes of each stage becoming the foundation for the next. This methodology is renowned for its rigorous documentation and specific features designed to be built in each step.

The V-Shaped Model

This SDLC model is often referred to as the Validation and Verification model owing to its emphasis on testing each step before proceeding to the next. This emphasizes the existence of a Quality Assurance procedure at each stage of development to ensure that everything is working as intended before moving ahead.

The Iterative Model

The iterative approach to development considers Iteration a vital aspect. Rather than starting with a complete set of specifications, developers produce a basic version and test it, then improve upon it until all requirements are fulfilled. With each modification in the code, a new release is issued. This process is repeated until the project is completed.

The Spiral Model

The Spiral approach merges architectural planning with iterative prototype development, allowing for the launch and enhancement of products at each level. Developing prototypes after each stage facilitates early risk assessment and mitigation, making it an ideal methodology for large-scale and costly projects. This approach enables teams to anticipate and avert potential problems before committing further time and resources.

The Big Bang Model

The Big Band Model is recognized as one of the simplest SDLC models. There is no pre-existing structure required, which means there is minimal planning and structuring required. However, it can be expensive and coding can consume a lot of time.

Big Bang is frequently used in small-scale projects or in educational settings. This is because of its effectiveness in groups that do not have strict regulations or an established release date.

The Prototype Design

In this model, the prototype is built before the program. The capability and effectiveness of prototype models are limited when compared to the final product. However, they can be beneficial when teams require honest feedback from clients.

The first stage of this model’s approach is to conduct customer interviews and create a prototype with the most important features. After obtaining feedback and comments from the customer, the development team will refine the prototype. This process will continue until the prototype has been approved by the user.

Agile Modelling

Clear communication between the development team and the customer is crucial to the Agile Software Development Lifecycle (SDLC) process. Customer feedback is gathered and considered after each development cycle, making the Agile approach an optimal framework for distributed working groups. Projects generally run between two and four weeks, with work being completed in regular, iterative cycles known as sprints.

Expanding Your IT Team?

In the absence of a suitable software development team, the choice of a software development life cycle (SDLC) model and the efficacy of the project planning are irrelevant. It would be akin to filling a room with Fender guitars and staffing it with doctors who, though capable of playing the guitar, may not be the best fit for the job.

We understand the challenge of finding experienced programmers. Nevertheless, with the appropriate approach and research, it is feasible to locate the suitable candidates. We have confidence in this owing to our vast experience in the industry.

Our IT staffing experts have been offering recruitment services for a decade. They have been trained and educated in global recruitment selection. In under two weeks, our remote recruiters – who practice what they preach – will locate a fitting candidate who is in line with your company’s ethos and will work with you directly once you have specified your requirements for a remote developer.

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