SDLC IN C LANGUAGE

SDLC (software development life cycle)

SDLC TIERS

SDLC LIFE CYCLE MODELS 

Software development life cycle (SDLC) is a process that describes how software is built, maintained, replaced, and improved over time. SDLC is a roadmap that outlines how software is developed, maintained, and enhanced over time. It defines a way to improve the quality of the software and the overall development process.

What are the stages of the software development life cycle?

Software development life cycles (SDLCs) define the tasks to be completed at different stages by software engineers or developers. SDLCs make sure they stay within the company's budget while also satisfying the customer's expectations. Therefore, a software engineer needs to have a good understanding of the software development process.

There are a total of 7 phases of the software engineering cycle planning, analysis, design, development, testing, software development, and maintenance.

Let us understand briefly.

We Think App is a Software and Mobile app improvement employer that follows the Software Development Life Cycle (SDLC) to ensure the successful shipping of amazing cellular apps. To guarantee that each step of the improvement process is well-planned, carried out, and tracked, We Think App adheres to the best practices of SDLC.

 The following are a number of the Best SDLC tiers to follow:

Stage-1: Planning and Requirement

Examination Planning is crucial for any activity, but it's extremely important when creating software. The organization's builders additionally complete the requirement evaluation throughout this time. Customer feedback and market and income department surveys are the sources of this information. The information from this evaluation provides a complete list of the components of a basic project. Careful planning is what led to the project's exceptional excellence. This indicates that the main venture's design has taken into account all of the available facts.

 Stage 2: Defining Requirements

At this phase, every requirement for the planned program is outlined. All parties, including customers, stakeholders, and industry experts, endorse these demands.

The usage of SRSs, or software requirement specifications, allows for this to happen. Throughout the project, this document details everything that has to be specified or produced

Stage 3: Designing

In the planning stage, a detailed plan is prepared by the software. In this phase, Data structures, interfaces, modules, and program architecture are all created by the software team. In addition, they design the software's appearance and functionality through the creation of wireframes and mockups. To guarantee the software is scalable, maintainable, and fulfills client needs, the design phase is crucial as it gives developers with a road map for creating the program.

Stage 4: Development stage

During the development stage, the software is coded after the design specifications created in the previous step. Currently, the developers use a variety of frameworks, programming languages, and development tools for making the software. Unit testing is another step they take to make sure every part works as it should. The development step is essential to making the software a reality and ensuring its high-caliber

Stage 5: Product testing and integration

Testing is essential to ensure the software continues to function properly after development. However, testing is done as little as possible at each stage of the SDLC. As such, at this point, every possible issue is found, fixed, and tested once more. This ensures that the product meets SRS requirements.

Instruction, Assistance, and Record-keeping: The program documentation is a crucial component of the software development life cycle. A well-written document can contain all the information required to understand software operations, maintenance, and processes. The handbook contains usage instructions for the product as well. Any training program's objective should be to assist staff members in becoming more productive and efficient workers both now and in the future. Usually, this is achieved by encouraging constructive behavioral changes, increasing knowledge, and honing skills.

Stage 6: Deployment and maintenance of products

The organization's strategy requires a gradual release of the finished product after comprehensive testing. After that, it is tested in an actual industrial environment. Making sure the system runs smoothly is essential. In a good outcome, the manufacturer will send out the full order. After getting meaningful feedback, the company either distributes it exactly as is or makes additional improvements to make it even more beneficial to customers. However, it is insufficient on its own. Consequently, commissioning and product monitoring go hand in hand

SDLC life cycle models

The Software Development Life Cycle (SDLC), a conceptual model used in project management, lays out the phases that an information system development project must follow. These stages start with a viability study and conclude with application maintenance. The software development process makes use of several concepts and definitions related to software. These models are also referred to as "software development process models." Every process model follows a different order of steps to ensure success during the software development phase.

     1)  Waterfall model

It stands for the SDLC's core model. This model is quite basic. All other software development life cycle (SDLC) models are based on the waterfall model, which is no longer used in reality. The waterfall approach is easy to implement and yields measurable outcomes because of its simple design. The waterfall paradigm is no longer feasible because it is less flexible; once a step appears to be finished, it cannot be altered.

 2) Agile model

Development and testing collaborate throughout the software development life cycle (SDLC) when an agile methodology is used. The Agile technique divides the project into smaller, easier-to-manage segments. Every one of these versions has iterations that last anywhere from one to three weeks.

Iterative stages that adhere to a set of fundamental presumptions regarding the majority of software projects—namely, that it is difficult to predict which software needs will persist and which will change—are what characterize agile software development. It is also difficult to predict how project stakeholders' priorities will change.

 

Many types of software design and development are intertwined. In other words, both activities should be done in parallel to demonstrate the design patterns in their creation. It's hard to imagine how much planning is required before testing a configuration with a build.

Analysis, design, development, and testing are not as predictable (from a project perspective) as we would like.

 

     3)Iterative model

   The process of developing software that starts with a basic version and steadily adds functionality and complexity until the final product is ready is known as the software development life cycle (SDLC). In summary, iterative development is a strategy that breaks down the creation of software for large applications into smaller, easier-to-manage jobs.

 

      4) Spiral model

The spiral model is one process model that is influenced by risk. This software development life cycle (SDLC) paradigm makes it easier for the group to adapt features from waterfall, incremental, and waterfall process models. Rapid prototyping and concurrent processes are combined in the spiral design and development methodology.

The goals of each spiral cycle are stated at the beginning, and then come the different ways to achieve those goals, and lastly, the limitations that need to be taken into account. Here we start in the upper-left quadrant of the cycle.

The next step of the process entails evaluating these choices given the objectives and constraints. Perceived project risk serves as the main evaluation metric at this point.

Making preparations to deal with risks and uncertainty is the next step. This method may include steps like simulation, prototyping, and benchmarking.

 

      5) V-shaped model

The V-shaped model is executed sequentially in V-shape. Every step or part of this model has an integrated testing process. There is a testing phase that goes along with each development stage, and the next stage doesn't start until the testing phase is over. The verification model and validation model are some of its other names.

 

    6)  Big Bang model

The Big Bang model devotes all of its resources to software development and coding without any prior planning. Every need is identified and taken care of when it comes up.

This paradigm works well for smaller projects with a coherent development team. Academic institutions' software development projects can also profit from it. This is the ideal template to utilize if the requirements are unclear or the deadline is ambiguous.

7)  RAD model

One approach to rapidly developing software is Rapid Application Development (RAD), which follows the waterfall model. Better systems can be developed more quickly according to the RAD model's core premise that focus groups are a better approach to getting requirements.

• Business modelling
• Data modeling
• Process Modelling
• Application Generation
• Testing and Turnover

  8)  Incremental model

The incremental model cannot exist on its own. A series of waterfall cycles will inevitably occur. When the project starts, the needs are divided into numerous groups. Every team follows the SDLC process to produce software. Ensuring that every need is met is ensured by the SDLC process' iterative addition of functionality. This method maintains the previous software release throughout each cycle. The incremental model has been modified to allow for the overlapping of development cycles. The next cycle may begin before the previous one is finished when it ends.

 9)  Iterative model

Software development life cycle refers to the process of creating software from the ground up, beginning with a simple version and gradually adding features and complexity until the end product is ready. In conclusion, iterative development is a method that divides the development of software for big applications into smaller, more manageable tasks.