Software Development Life Cycle SDLC Phases & Models

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With an unambiguous SRS, the software development team plans the best way to achieve the goal of creating the software. The aim is to optimize the process of creating the software based on cost, speed, time, and other factors while adhering to the client’s exact requirements. Those methods have progressed alongside advances in hardware, development tools, and modern thinking about the organizational management of software development teams. New software development methods have grown out of private and public software projects.

  • This is accomplished through «SRS»- Software Requirement Specification document which contains all the product requirements to be constructed and developed during the project life cycle.
  • In many software development teams, the phases involved in an SDLC process are broken down into smaller parts.
  • At this stage, engineers work through the set list of tasks to transform the pre-approved architecture into a functional system.
  • Users offer input on the prototype, developers implement the requested changes, and the team creates a better version of the prototype.

This process conducted with the help of ‘Software Requirement Specification’ document also known as ‘SRS’ document. It includes everything which should be designed and developed during the project life cycle. The Waterfall model is the most widely used and oldest approach to a software development life cycle. It is straightforward and follows a linear path where the outcome obtained from one phase is used as the input for the subsequent phase. Here, the next phase starts only when the previous phase gets completed.

Spiral Model

As we’ll discuss later, Agile methods tend to “wind together” all of these steps into a tight, rapidly-repeating cycle. The number of SDLC phases may vary according to the preferences of the development lead or company, but most SDLC examples use six or seven phases. If anything, it seems to have fallen out of the popular development lexicon in recent years. But SDLC can be an extremely useful tool for development leaders who need to organize and optimize their teams at a high-level. CI/CD (Continuous Integration and Continuous Delivery) is a set of practices and methods that speed up software delivery by introducing automation into an SDLC.

Once the design specification is prepared, all the stakeholders will review this plan and provide their feedback and suggestions. It is absolutely mandatory to collect and incorporate stakeholder’s input in the document, as a small mistake can lead to cost overrun. Because a software product’s usage varies from customer to customer (each person has different needs), there may be unique issues that come up and need to be addressed. The document is shared with the development team, which then uses it in the next stage. As the volume of enterprise data and the automation of business workflows continue to increase at a rapid pace, software development will only continue to grow.

How Does SDLC Work?

For this, developers use a specific programming code as per the design in the DDS. Hence, it is important for the coders to follow the protocols set by the association. Conventional programming tools like compilers, interpreters, debuggers, etc. are also put into use at this stage. Some popular languages like C/C++, Python, Java, etc. are put into use as per the software regulations. In this stage, all the requirements for the target software are specified. These requirements get approval from customers, market analysts, and stakeholders.

sdlc steps

Create a timeline with milestones and dependencies to track progress, and set up automated alerts to notify you as anything changes. Share your plan with your team and key stakeholders to provide visibility, and assign tasks to individuals to ensure nothing slips through the cracks. It’s important to note that the software development life cycle is not the same as project management. SDLC is a framework for developing software, while project management is a process for managing all aspects of a project. The software development lifecycle (SDLC) outlines several tasks required to build a software application. The development process goes through several stages as developers add new features and fix bugs in the software.

Design Plan

Teams start thinking about security risks and measures during the first stage of the SDLC. The agile approach requires the team to perform testing at the end of each sprint to ensure no potential exploits end up in production. The iterative incremental model requires the team to quickly deploy an incomplete version of the software at the end of each development cycle. A product’s SDLC must be a living process that the team regularly updates (or at least reviews). Keeping an SDLC up to date takes a combined effort of business analysts, developers, QA staff members, and stakeholders.

sdlc steps

Successful implementation of the SDLC will
help ensure that businesses receive a system that is suitable for their
operational needs. Then based on the assessment, the software may be released as it is or with suggested enhancement in the sdlc steps object segment. During this stage, unit testing, integration testing, system testing, acceptance testing are done. The senior members of the team perform it with inputs from all the stakeholders and domain experts or SMEs in the industry.

What is SDLC? Software Development Life Cycle Defined

This model works best for small projects with smaller size development team which are working together. It is an ideal model where requirements is either unknown or final release date is not given. The requirements are divided into groups at the start of the project.

SDLC is a systematic process for building software that ensures the quality and correctness of the software built. SDLC process aims to produce high-quality software that meets customer expectations. The system development should be complete in the pre-defined time frame and cost. SDLC consists of a detailed plan which explains how to plan, build, and maintain specific software. Every phase of the SDLC life Cycle has its own process and deliverables that feed into the next phase. SDLC stands for Software Development Life Cycle and is also referred to as the Application Development life-cycle.

Software Testing

When all the features are built and iterated, you can release the complete product with all the features. It involves four phases – inception, elaboration, constriction, and transition. You can perform software testing manually or by using tools to track and detect the issues. This is a continuous process until your software is free of bugs and meets the quality standard.

Continuous feedback and implementation throughout software development is a distinctive feature of DevOps. Furthermore, companies that prefer this approach strive to automate manual processes to maximize resource management. Based on the Business Specification document, senior development team members bring together the input of stakeholders and experts to plan out a software development project. The project may be focused on building a new software product or improving a current one.

Iterative Model

This will help you have a solid foundation heading into phase three. Much like planning for a vacation, you need to get your possessions organized and think about what bags to pack. Most importantly, the first three steps seek to generate answers to questions and the last three steps are optimized to provide outputs. Think about what you want to build and where your technology passions are. You could take notes, sketch diagrams, or build graphs to more deeply understand qualitative and quantitative feedback. Perhaps you would engage in a conversation with managers who lead hourly worker teams.


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