SLDC

 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.

Benefits of the SDLC

SDLC provides an upfront, centralized goal for everyone to agree with and understand. There is a clear plan for development, including resources and associated costs, and roles can be assigned out to ensure proper execution of the plan.

SDLC Phases

The entire SDLC process divided into the following SDLC steps:

Phase 1: Requirement collection and analysis

Phase 2: Feasibility study

Phase 3: Design

Phase 4: Coding

Phase 5: Testing

Phase 6: Installation/Deployment

Phase 7: Maintenance

Best Practices of Software Development

• Source Control

Source control keeps all of the code in a single location in order to secure the working code. This can be a physical location or a virtual location wherein users can login to an encrypted cloud environment.

• Continuous Integration

Continuous Integration (CI) is a  software development practice that enables the developers to merge their code changes in the central repository to run automated builds and tests. It refers to the process of automating the integration of code changes coming from several sources. The process comprises several automation tools that emphasize on the code’s correctness before Integration. 

• SDLC Management Systems

Add transparency to systems through each phase of the project, and throughout the project as a whole. SDLC management systems control each step of the way while adding analytics, work management systems, and bug-tracking that can improve parts of the lice cycle that aren’t running effectively.

The software development life cycle is an excellent process that can help teams through the process of developing and deploying software, including necessary fixes, by utilizing best practices and methodologies.

Popular SDLC Models

Waterfall model in SDLC

The waterfall is a widely accepted SDLC model. In this approach, the whole process of the software development is divided into various phases of SDLC. In this SDLC model, the outcome of one phase acts as the input for the next phase.

Incremental Model in SDLC

The incremental model is not a separate model. It is essentially a series of waterfall cycles. The requirements are divided into groups at the start of the project. For each group, the SDLC model is followed to develop software. The SDLC life cycle process is repeated, with each release adding more functionality until all requirements are met. In this method, every cycle act as the maintenance phase for the previous software release. Modification to the incremental model allows development cycles to overlap. After that subsequent cycle may begin before the previous cycle is complete.

V-Model in SDLC

In this type of SDLC model testing and the development, the phase is planned in parallel. So, there are verification phases of SDLC on the side and the validation phase on the other side. V-Model joins by Coding phase.

Agile Model in SDLC

Agile methodology is a practice which promotes continue interaction of development and testing during the SDLC process of any project. In the Agile method, the entire project is divided into small incremental builds. All of these builds are provided in iterations, and each iteration lasts from one to three weeks.

Spiral Model

The spiral model is a risk-driven process model. This SDLC testing model helps the team to adopt elements of one or more process models like a waterfall, incremental, etc.This model adopts the best features of the prototyping model and the waterfall model. The spiral methodology is a combination of rapid prototyping and concurrency in design and development activities.

Big bang model

Big bang model is focusing on all types of resources in software development and coding, with no or very little planning. The requirements are understood and implemented when they come.This model works best for small projects with smaller size development team which are working together. It is also useful for academic software development projects. It is an ideal model where requirements is either unknown or final release date is not given.