What is SDLC? Understand the Software Development Life Cycle

Date: December 8, 2021
Category: Software development

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SDLC requirements phase

However, this model doesn’t work well when flexibility is a requirement. There is little room for change once a phase is deemed complete, as changes can affect the cost, delivery time, and quality of the software. On the test execution phase, specialists perform testing based on the plans and cases created by the senior engineers or project managers. They verify if all requirements in the RTM match and report any errors found to the developers.

Why Does the SDLC Matter for Software Delivery?

And of course, the systems documentation and user guides also had to be updated, plus new training aids and wikis to support the overall deployment had to be developed and deployed. A comprehensive Secure SDLC includes mandatory risk assessments and threat modeling. This identifies sensitive attack surfaces of software that must be hardened in order to protect critical assets. This important step helps build a threat model for future development projects.

This method allows you to identify flaws at the earliest stages of project development and minimize errors in the future. With the adoption of faster and newer development life cycles, organizations are moving away from older SDLC models . With ever-increasing demands for speed and agility in the development process, automation has played a key role. Synopsys Application Security Testing Services offer the solution for applying AppSec testing effectively across your full application portfolio.

What are the Seven Phases of SDLC?

Emerging as a cult industry practice, it talks about establishing a predictable and iterative process for each stage of software development. And, as noises around integrating security earlier in system development lifecycle phases grow louder, SDLC is here to rock the boat, one wave at a time. Gathering requirements for the project is the most important part of the SDLC for project managers and internal stakeholders of a project. The customer meets with business managers and analysts to provide the requirements. It’s important for the project team to understand the needs of the customer because this information is critical to developing the product the customer requests. In this guide, we’ll provide an overview of the software development life cycle and its seven phases, as well as a comparison of the most popular SDLC models.

The engineers receive the requirements and the design from the other team members and the actual implementation work starts. The designers pass the requirements to create a very detailed prototype that covers every aspect of the user journey. The prototype should cover all possible cases, including error messages, status, and interactions. Corporations use the SDLC to define, build, and maintain software products. It is a detailed process that creates a comprehensive outline for the engineers’ workflow. CI/CD is a set of practices and methods that speed up software delivery by introducing automation into an SDLC.

What Is the Secure SDLC (Software Development Life Cycle)?

Most tests should be automated, especially if you have implemented CI/CD pipeline. The goal of the testing phase is to ensure that every feature works as expected. Many companies decide to build a prototype at this stage of the SDLC process. An early-build prototype, and its validation by potential users or the client reduces project risk.

SDLC requirements phase

Development teams can write evil use cases and security stories during requirements and threat modeling. During this phase of the SSDLC, security engineers assist in determining the scope of the software that needs to be hardened. They determine the probability of attack surfaces in the application and what critical sections, at a minimum, will require threat modeling. https://globalcloudteam.com/ In establishing the areas of the application that are most likely to be targeted by attackers, security experts can project and prevent likely attack vectors and potential exploits. Alternatively, some enterprises with a better budget may also opt for hiring domain experts from a particular industry in which the software product is going to be built.

Stages of Software Development Process

Without strict adherence to all aspects of the parameters and design plans, a project can easily miss the mark. In the iterative process, each development cycle produces an incomplete but deployable version of the software. The first iteration implements a small set of the software requirements, and each subsequent version adds more requirements.

  • This SDLC model refers to the traditional and seasoned project management approach that places initial planning at the heart of all processes.
  • This type of analysis provides a description of the future state, and is often described as a “to be” assessment.
  • After the customer provides requirements for the product, the project manager and members of the project team begin to analyze the requirements.
  • Following proper CI practices, work stops until the build is successful.
  • Deliver quality systems which meet or exceed customer expectations when promised and within cost estimates.
  • Ideally, the deployment phase happens automatically (typically as a part of CI/CD).
  • It is a detailed process that creates a comprehensive outline for the engineers’ workflow.

This article will explain how SDLC works, dive deeper in each of the phases, and provide you with examples to get a better understanding of each phase. Having executed close to a hundred assessments across Europe, Asia, South Africa, and North America, I was able to observe many different implementations of all classic security controls and much more.

Clear project design

The project team records the results of the requirement gathering and analysis sessions in a requirements specification document for further use during the next phase of the SDLC. If the team discovers a defect, the code goes back a step in its life cycle, and developers create a new, flaw-free version of the software. The testing stage ends when the product is stable, free of bugs, and up to quality standards defined in the previous phases. SDLC works by lowering the cost of software development while simultaneously improving quality and shortening production time. SDLC achieves these apparently divergent goals by following a plan that removes the typical pitfalls of software development projects. In this stage of work, teams build the software solutions based on the design decisions made.

SDLC requirements phase