Overview of the SDLC
The Software Development Life Cycle, or SDLC, is the procedure for organising, developing, testing, and delivering software. The SDLC provides clear explanations of the various activities that must be completed at each stage of the software development process. Planning, requirements, design, development, testing, deployment, and maintenance are the many phases of the SDLC. The waterfall model, spiral model, V-shaped model, iterative model, big bang model, and agile model are some examples of SDLC models. The phases of the SDLC make it simple to evaluate each stage of software development and enable concurrent programming by programmers. Not a technique, but a procedure that must be followed.
Types of SDLC Phases
The software lifetime has a number of phases, which are listed below:
· Phase of Requirements
· Phase of Analysis
· Planning Stage
· Phase of Development
· Phase of Testing
· Phase of Deployment and Maintenance
1. Requirements Phase
The Life Cycle of SDET Training begins with this crucial first step. Gathering the needs from clients or consumers is the first step. Business analysts handle this position in the majority of firms. A business analyst engages in customer/client interaction, organises daily meetings, documents the needs in business requirement specifications (or simple business specifications), and then provides the development team with the final, documented requirement. Business analysts are in charge of making sure that every detail is noted and recorded as well as that everyone is aware of the customer needs.
2. Analysis Phase
Analyzing the requirements and getting customer/client approval come next when the requirement gathering step is finished. This is accomplished through the creation of a software requirement specification (SRS), which is made up of all the requirements produced and obtained throughout the requirements gathering phase. Project managers, business analysts, and consultants are primarily responsible for this phase.
3. Inventive Phase
The following step once the analysis phase is complete is to design the product's architecture in the most precise, reliable, effective, and affordable way possible. In this phase, typically more than one design is put out, and the best one is chosen based on a variety of factors, including robustness, durability, timeliness, cost-effectiveness, and many others! Typically, Design Document Specification, or DDS, contains documentation of the various design architectures.
There are two design strategies used in this phase:
Low-Level Design: The Senior Developers are responsible for this task, in which they define the purpose of each module of the next product architecture.
High-Level Design: Architects and senior architects are responsible for carrying out this activity, which entails designing several potential product architectures.
4. Development Phase
Programming languages and other frameworks are really implemented during this stage of the product development process. All developers participate in this phase. Developers must adhere to a set of preset coding standards and rules and finish the project modules by the date specified for the project. This phase of the software development life cycle is also the longest and one of the most important phases. A source code document serves as documentation for this stage (SCD).
5. Testing Phase
The produced programme must then be tested after the development phase is over. The testing team receives the generated software and extensively tests it using various testing methods to hunt for flaws. The testing team documents any defects detected and sends the documentation back to the development team for correction. The company's software testers and quality analysts are in charge of this position. The testing team must guarantee that every element of the software is fault-free and functions as intended.
6. Phase of Deployment and Maintenance
The first iteration of the SDET is deployed and given to the client for their use following the testing phase. When a big group of end customers begin using the built programme, there is a possibility that some boundary instances may have been missed, therefore there is a scope for bug fixing that was not discovered during the testing process. The programme can also be updated with newer versions and the most recent security updates and technological advancements. Finally, by incorporating new features into the current software, there is also room for improvement.
Popular SDLC models
There are a variety of SDLC models available that can be used in the software development cycle.
The most significant and well-liked ones are:
Cascade Model
Model Iteration
Model Spiral
V-Model
1. Model of a waterfall
The waterfall model divides the entire software development process into phases, with the output from one phase serving as the input for the next. Only after the prior phase is complete does the following one start.
2. Iterative Model
This model begins with a more condensed set of requirements, and it can initiate the SDLC process without the full context of the product specification. Each iteration of the SDLC process, which is repetitious, results in the creation of a newer version of the programme. There may be two to six weeks between iterations. In this method, a distinct component is developed during each iteration. Additionally, this methodology needs more resources than the waterfall model.
3. Spiral Model
This approach, which combines the Waterfall and Spiral models, operates iteratively. This approach directs the team to adopt components of one or more SDLC models, such as a waterfall or iterative model, depending on the level of risk associated with the project. Here, the software lifecycle is broken down into smaller components, allowing for the addition of new functionality to the software even at the end of the SDLC.
4. V-Model
The concurrent planning of the testing and development phases in the V model is essentially an extension of the waterfall approach. The verification phase is on one side, the validation phase is on the other, and coding connects them both in the end. Only after the preceding state is finished does the subsequent state begin.
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