SDLC

SDLC 

SDLC

In this model the process execution done in V shape manner. SDLC

It is also known as Verification and validation model. SDLC

It is the extension of waterfall model. SDLC

It follows similar actions, but adds more to it creating a parallel of steps, hence the name V-model. SDLC

For each development phase, there is a testing phase as well. SDLC

SDLC https://www.tracedynamics.com/sdlc

Instead of the stages following a cascade effect, they swoop back up to potentially repeated part of the process. SDLC

After determining the requirements and making sure everyone agrees with and knows what to expect, the designing stage is broken down by system, architectural, and modular designs. SDLC

Testing is done after each to find any possible flaws hiding within the software. SDLC

Coding is completed and the testing stage can begin, but as in the same fashion as the design stage, the testing is broken down. SDLC

It consists of unit, integration, system, and acceptance. SDLC

This breakdown offers multiple trials for the product to give the most chance for issue correction before release, thus possibly pulling it back into the development stages. SDLC

Each testing phase corresponds with one of the development stages to give a more defined process. SDLC

The V-Model does take longer than the Waterfall Model and has many of the same downfalls, but it offers more chances to fix issues earlier on. SDLC

While it is definitely a detailed way to perfect a project, it limits the flexibility of fixing bugs later on. SDLC

In this model the next phase will only start when the previous phase developed and tested thoroughly. SDLC

In this model, there’re Verification phases on one side of the ‘V’ while the validations phases are on the other side. SDLC

The Coding Phase joins both sides of the Model. SDLC

Verification Phases of V Model Includes: SDLC

• Business Requirement Analysis. SDLC
• System Design. SDLC
• Architectural Design. SDLC
• Module Design. SDLC
• Coding Phase. SDLC

Validation Phases of V Model Includes: SDLC

• Unit Testing. SDLC
• Integration Testing. SDLC
• System Testing. SDLC
• Acceptance Testing. SDLC

Applications using V-Model SDLC

• Used for small to medium-sized projects where the requirements defined clearly and fixed. SDLC
• When enough technical resources are on hand with the required technical skills. SDLC

Why you should use V-Model SDLC

• The progress of the project goes systematically. SDLC
• Suitable for small and medium-size projects. SDLC
• Testing will start from the requirement phase. SDLC
• Tracking the progress of the project is easy. SDLC

SDLC

SDLC

The spiral methodology merges the possibility of iterative improvement with some of the controlled parts of the waterfall model. SDLC

This methodology is a fusion of the iterative development model and the waterfall model. SDLC

SDLC

A less costly option is the Spiral Model. SDLC

This combines the Waterfall and the Iterative methods to utilize risk management and is best for projects with difficult and complicated requirements. SDLC

The Spiral Model is great for products that need constant improvement and change. SDLC

This system heavily relies on constant communication between the customer and the SDLC team. SDLC

The idea is that you design and then build the software according to the base requirements, creating a Proof of Concept, or POC, that indicates what changes and alterations need to be made. SDLC

The developers and customer analyze the overall performance, taking note of issues, then the developers start the process over again, fixing those issues and reducing risk. SDLC

With each cycle, the product becomes more refined. SDLC

A significant downside to this model is the potential for the spiral to never end. It requires good management and a good deal of particular record keeping. SDLC

The more it cycles, the more complicated things can get. Of course, this hassle is worth it for projects that are high risk and need an evolving software. SDLC

The spiral model has further divided into different stages. SDLC

• Identification SDLC
• Design SDLC
• Construct and Build SDLC
• Evaluation and Risk Analysis SDLC

• 

  SDLC

Project using this model go ver and over through the above-mentioned phases in iterations ,and that is why known as spiral model. SDLC

Applications using the Spiral Model SDLC 

Applications using the spiral model include when: SDLC

• Requirements are not precise, and they need an assessment to get a  SDLCbetter idea of what the client is expecting. SDLC
• The product releases are required to be frequent. SDLC
• Critical modifications expected during the development of the software product. SDLC
• Medium to high risks projects. SDLC
• Limited budget but risk evaluation must do. SDLC

Reasons to use Spiral Model SDLC

• The early software build is available for the clients. SDLC
• The evolving requirements from clients get accommodated. SDLC
• Monitoring of the project is useful and secure. SDLC
• This model is highly flexible. SDLC

SDLC

SDLC

SDLC

In this model of software development life cycle, the iterative method begins with a simple execution of the small group of the requirements.

Iteratively the versions enhanced until we have a complete system that is all set to implement and deploy.

An iterative life cycle model doesn’t begin with a complete set of requirements by the client, so it is easier to use.

The development process starts by listing the requirements and executing only part of the program or system, which assessed to recognize the further needs of the software.

SDLC

A model that is more suitable for changing needs and bigger products is the Iterative Model.

This one differs from the previously mentioned models by focusing on subsets of the software after the requirements stage and up to the release.

This allows user feedback, a greater ability to find issues during development, and an easier time fixing those issues.

Because the software is being built piece by piece, it does take longer and require higher levels of resources.

It all has to work together and without the skills to accomplish that it would be disastrous.

It essentially requires rewriting the software each time, with more added to it and fixes worked in.

One big benefit is that with each version of the software completed, it gives the customer and users a product they can use, satisfying their needs at a quicker pace while still improving the product.

However, this can also open the product to issues in the overall outcome.

As mentioned previously, it takes a great deal of skill to make sure all the pieces fit together, and even the most skilled may run into an unforeseen problem once all the subsets are finalized.

In the iterative model, modifications made in the system design and some new features during each iteration.

This process continues until complete software is ready according to the client’s requirements.

Applications using Iterative Model

The iterative model used when:

• The system requirements defined and understood clearly.
• The development project is vast.
• The main requirements of the software or system must be well-defined; though, some minor details could add with time.

Why should you use Iterative Model?

• We can easily measure the progress of the project.
• Testing and troubleshooting during smaller iteration is easy.
• Planning of parallel development
• It is readily acceptable to the ever-changing needs of the project.
• Risks recognized and resolved during the iteration.

SDLC

SDLC

SDLC

Waterfall methodology is the most widely recognized SDLC model. SDLC

It was the first process model. SDLC

Another name for the waterfall model is the linear sequential life cycle model. SDLC

Each phase in the waterfall model must finish before moving on to the next stage. SDLC

In the waterfall model the process divided into separate and different phases. SDLC

The outcome of the previous phase serves as the input of the next phase. SDLC

SDLC

It’s straightforward and simple, but sometimes complicated projects require more steps. SDLC

Some software is better repeating various stages multiple times or even rearranging them a bit. SDLC

While the Waterfall Model shortens the project and offers an almost effortless explanation of the process and simple distribution of resources, the overall concern should always be on what is best for the proposed software. SDLC

This is certainly the easiest to keep track of stages and records, but it doesn’t have room for testing during the process and is not the best option for those products that require constant changes. SDLC

Though it is great for smaller projects that are made to be stable, it won’t give much insight into overall performance until later in development. SDLC

There are six phases in the waterfall model, including: SDLC

• 1. Requirement Gathering and analysis SDLC
• 2. System Design SDLC
• 3. Implementation SDLC
• 4. Integration and Testing SDLC
• 5. Deployment of system SDLC
• 6. Maintenance SDLC

Applications using Waterfall SDLC

The waterfall model used when: SDLC

• All the requirements are precise, documented, and fixed. SDLC
• No vague requirements. SDLC
• Smaller projects. SDLC

Why should you use Waterfall Model? SDLC

• The waterfall model follows a strict process. SDLC
• A phase must complete before moving to the next phase. SDLC
• It is simple and easy to understand. SDLC
• The tasks arranged efficiently. SDLC
• All the stages defined clearly. SDLC
• Capture the outcome of the project and process. SDLC

SDLC

SDLC

SDLC

When you complete the coding phase, the most critical stage comes in, i.e., testing the software. SDLC

It is applicable to both functional and non-functional testing. SDLC

Once they have created the product, it will be tested thoroughly. SDLC

Many of the methods utilize some testing throughout the process, but there is always a focus on it after the building process is complete. SDLC

This important stage will determine any weaknesses and give the developers an opportunity to correct them. SDLC

A certain part of the team will run the program through trials, trying to find any bugs or errors within the system. SDLC

If they find something, it’s reported back to the developers to fix. SDLC

Some models of SDLC will have multiple testing and developing stages in order to perfect the project. SDLC

Each module is unit tested to check whether it is working as per the requirements of the customer. SDLC

SDLC

The quality assurance and testing teams might discover a few bugs and errors during this stage. SDLC

They will convey these bugs and errors to the developers so that they can fix them. SDLC

As soon as they fix the bugs and errors, they will send back the software to the testing and QA team for re-testing it. SDLC

Execute until the software is error-free and bugs, and it is operating as per the requirements of the client. SDLC

SDLC

SDLC

SDLC

Once you complete the designing of the software, the next phase that arrives is Implementation. SDLC

After all the levels of planning are complete, it’s time to actually begin creating the software. SDLC

The development is done by the coding genius. SDLC

The programming tools and the language is determined by the job they are doing, using what fits the requirements the best. SDLC

During this stage, tasks are assigned in modules and preplanned guidelines must be followed. SDLC

The coders will use one of multiple programming languages and will write the code that builds the software. SDLC

If this is not done cooperatively, the program will not work correctly. SDLC

The DDS and SRS should give the developers all the information they need to know. SDLC

The tasks divided into different modules and units. SDLC

SDLC

These units and modules assigned to different developers. SDLC

This phase takes most of the time that defined for the project. SDLC

There are some of the predefined coding rules followed by the developers while developing the software. SDLC.

The programmers use compilers, interpreters, and debuggers for generating and implementing the code. SDLC

SDLC Requirement Specification

SDLC 

SDLC

The next stage is to prepare a Software Requirement Specification, or SRS, document that details exactly what will be needed to develop the product. SDLC

This phase is to define the requirements, document them, and then get them accepted from the client. SDLC

It gives the assessment the costs, legalities, feasibility, and schedule. SDLC

It tells if the technical capabilities are there to support the idea. SDLC

Does this project meet legal regulations and is the budget reasonable? This is what the stakeholders want to see and what they care the most about. SDLC

This information is taken to the customer or analysts for approval and final consultation, keeping everyone in the loop and ascertaining everyone’s satisfaction with the plan. SDLC

SDLC makes it easier for the developers, but there also needs to be a strong level of communication and continuity through the entire team to affirm the end result is what it should be. SDLC

If it’s not planned for in the SRS it can lead to dissatisfaction with the customer or somewhere in the team. SDLC

The following are the five types of feasibility checks. SDLC

SDLC

• Economic: Is it feasible to complete the project in the defined budget? SDLC
• Legal: Can this project handle regulatory compliance or frameworks? SDLC
• Feasibility of Operations: is it possible to create the operations that the client is expecting? SDLC
• Technical Support: Whether the current system will be able to handle and run the build software? SDLC
• Schedule: whether this project could complete in the given time frame? SDLC