SDLC vs STLC: What's the difference

So, in this article, I will be comparing Software Development Life Cycle and Software Testing Life Cycle (SDLC vs STLC). Let’s take a look at what we will be discussing in this article

What is SDLC?

Software Development Life Cycle (SDLC) aims to produce a high-quality system that meets or exceeds customer expectations, works effectively and efficiently in the current and planned information technology infrastructure, and is inexpensive to maintain and cost-effective to enhance.

What are the different phases of SDLC?

The different phases of the Software Testing Life Cycle are:

1. Requirement Phase
2. Analysis Phase
3. Design Phase
4. Development Phase
5. Testing Phase
6. Deployment & Maintenance Phase

SDLC – Complete Guide

Why SDLC?

Some of the reasons why SDLC is important in Software Development are as follows.

It provides visibility of a project plan to all the involved stakeholders
It helps us to avoid project risks
It allows us to track and control the project
It doesn’t conclude until all the requirements have been achieved

What is Software Testing Life Cycle (STLC)?

Software Testing Life Cycle (STLC) identifies what test activities to carry out and when to accomplish those test activities. Even though testing differs between organizations, there is a testing life cycle.

What are the different phases of STLC?

The different phases of the Software Testing Life Cycle are:

1. Requirement Analysis
2. Test Planning
3. Test Design
4. Test Environment Setup
5. Test Execution
6. Test Closure

STLC – Complete Guide

What is the difference between SDLC & STLC (SDLC vs STLC)?

Criterion	SDLC	STLC
Origin	Development Life Cycle	Testing Life Cycle
Stands for	SDLC stands for Software Development Life Cycle	STLC stands for Software Testing Life Cycle
Definition	Software Development Life Cycle (SDLC) aims to produce a high-quality system that meets or exceeds customer expectations, works effectively and efficiently in the current and planned information technology infrastructure, and is inexpensive to maintain and cost-effective to enhance.	Software Testing Life Cycle (STLC) identifies what test activities to carry out and when to accomplish those test activities. Even though testing differs between Organizations, there is a testing life cycle.
Focus	On both development and testing process	On only testing process
Relationship	It is taken as the predecessor	It is taken as the successor
Phases	Requirement Gathering, Analysis, Design, Coding, Testing, Deployment & maintenance	Requirement Analysis, Test Planning, Test Design, Environment Setup, Test Execution, Test Closure
Requirement Gathering Phase	Business analyst gathers the requirements and create Development Plan	QA team analyses requirement documents and create System Test Plan
Design Phase	The development team develops the high and low-level design of the software based on the requirements	Test Architect or a Test Lead usually plan the test strategy
Coding Phase	The actual code is developed as per the designed document	The QA team prepares the test environment
Testing Phase	Actual testing is done in this phase. It includes Unit, Integration, System, Retesting & Regression testing etc., Also the development team involves in fixing the bugs reported	Actual testing is done in this phase. Defect reporting & retesting is done here
Deployment or Maintenance Phase	The development team involves in support and release updates	The QA team executes regression suites to check maintenance code deployed
When it is performed	The SDLC phases are performed before the STLC phases	The STLC phases are performed after the SDLC phases
Outcome	A good quality software product	A bug free software

FAQ’s STLC vs SDLC

What are the 6 phases of STLC?

The 6 phases in Software Testing Life Cycle are as follows
Phase 1: Requirement Analysis.
Phase 2: Test Planning.
Phase 3: Test Design.
Phase 4: Test Environment Setup.
Phase 5: Test Execution.
Phase 6: Test Cycle Closure.

Is STLC a part of SDLC?

Yes, Software Testing Life Cycle is a part of the Software Development Life Cycle. SDLC plays an important role in complete software development and STLC confines to the testing phase. So STLC is a subset of SDLC.

What is V model SDLC?

V-Model is an SDLC model. V model means Verification and Validation model. In V-Shaped life cycle execution of processes happens in a sequential manner in a V-shape.

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