Introduction
Hello Ninja, I hope you are doing great. Do you know about Software Development Life Cycle and Software Testing Life Cycle? If not, don't worry. We are here to enrich your knowledge and clear all your doubts.

This article will discuss Software Development Life Cycle and all its phases. We will also cover the Software Testing Life Cycle, its phases, and the differences between STLC and SDLC.
Also read, V Model in Software Engineering
SDLC (Software Development Life Cycle)
The Software Development Life Cycle is a process the software industry uses to design, develop, and test software. Certain phases in the Software Development Life Cycle include Requirement Analysis, Design, Development, Testing, and Maintenance.

Phase 1: Requirement Analysis
It is the initial stage of the software development life cycle, during which all the data required to create the software in accordance with the customer's requirements is gathered from them.
Therefore, the primary goal of this phase is to gather specifics about each customer demand so that the developers will understand exactly what they are producing and how to satisfy customer expectations.
Phase 2: A Feasibility Study
In this phase, the organization discusses the cost and benefits of the software. It is a crucial phase because profit plays a vital role. If the software's price is very high, the company may face losses. This phase determines how beneficial the product is for the organization.
Phase 3: Design
In this phase, the architects start working on the logical design of the software. The document called System Requirement Specification contains the logical details of the software, like how the software will look, the database design of the software, modular structures, etc. This phase provides the prototype of the final product.
Phase 4: Building or Developing the Product
When the software's design is completed, a group of developers starts writing the programs. All the software components, like the software's interface and internal features, are implemented in this phase.
Phase 5: Testing
The testers receive the software when it has finished development. The testing team starts by checking the system's overall functionality. During this phase, the software is examined for flaws and problems. Every time a bug is discovered, the software is sent back to the development team for correction before being tested again as a whole
Phase 6: Deployment
After comprehensive testing of the software and checking that it is bug-free, the software is launched and available for users to use. Even after the deployment of the software, if any bugs are still found, the maintenance team re-evaluates the software, and then it is redeployed with a new version.
Phase 7: Maintenance
The maintenance team looks over the software usage and user feedback. Maintenance is necessary to eliminate errors in the system during its working life. The maintenance team looks over the software's bug fixing, upgrade, and enhancement.