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Software Testing Life Cycle (STLC) – Complete Breakdown with Myntra Example

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STLC

The Software Testing Life Cycle (STLC) is a structured approach to testing software applications to ensure quality. Below is a phase-by-phase breakdown, including required documents, responsible roles, and a real-world example using Myntra’s “Virtual Try-On” feature.

1. Requirement Analysis

Objective: Understand what to test based on requirements.

Key Activities:

  • Identify testable requirements
  • Analyze functional & non-functional needs
  • Define scope of testing

Documents Required:

Requirement Traceability Matrix (RTM)
Feasibility Report for Testing

Roles Involved:

Business Analyst – Clarifies requirements
QA Lead – Defines test scope
Product Owner – Approves test approach

Myntra Example:

  • Requirement: “Virtual Try-On should work on 90% of smartphone cameras”
  • RTM: Maps test cases to this requirement

2. Test Planning

Objective: Define how to test.

Key Activities:

  • Prepare test strategy
  • Estimate effort/resources
  • Select testing tools

Documents Required:

Test Plan Document
Test Estimation Sheet

Roles Involved:

Test Manager – Creates master test plan
QA Architect – Chooses tools/frameworks

Myntra Example:

  • Test Plan: Includes:
  • Manual testing for UI/UX
  • Automation for regression
  • Performance testing for AI model

3. Test Case Development

Objective: Create detailed test cases.

Key Activities:

  • Write test cases & scripts
  • Prepare test data
  • Review test cases

Documents Required:

Test Cases Document
Test Data Repository

Roles Involved:

QA Engineers – Write test cases
Domain Experts – Validate test scenarios

Myntra Example:

  • Test Case: “Verify sunglasses alignment on different face shapes”
  • Test Data: 100+ face images with different features

4. Test Environment Setup

Objective: Prepare the test bed.

Key Activities:

  • Configure hardware/software
  • Deploy test build
  • Prepare test devices

**Documents Required:

Test Environment Checklist
Configuration Document

Roles Involved:

DevOps Engineer – Sets up environments
System Admin – Manages test servers

Myntra Example:

  • Environment:
  • iOS/Android test devices
  • Staging server with 3D model processor

5. Test Execution

Objective: Run tests and log defects.

Key Activities:

  • Execute test cases
  • Log defects
  • Retest fixes

**Documents Required:

Test Execution Report
Defect Report

Roles Involved:

Testers – Execute tests
Developers – Fix defects

Myntra Example:

  • Defect Found: “Virtual sunglasses float 2cm above ears on iPhone X”
  • Priority: P1 (Critical)

6. Test Cycle Closure

Objective: Evaluate testing process.

Key Activities:

  • Analyze test metrics
  • Document lessons learned
  • Sign-off testing

**Documents Required:

Test Summary Report
Lessons Learned Document

Roles Involved:

Test Manager – Prepares final report
Stakeholders – Approve release

Myntra Example:

  • Metrics:
  • 95% test cases passed
  • 5 critical defects fixed
  • Conclusion: Feature ready for production

STLC Summary for Myntra Virtual Try-On

PhaseKey DocumentsResponsible RolesMyntra Example
Requirement AnalysisRTM, Feasibility ReportBA, QA LeadMap try-on requirements to test cases
Test PlanningTest Plan, EstimationTest ManagerPlan manual/automation testing mix
Test Case DevelopmentTest Cases, Test DataQA EngineersCreate 50+ try-on test scenarios
Environment SetupEnv Checklist, Config DocDevOps, Sys AdminSetup mobile device lab
Test ExecutionExecution Report, DefectsTesters, DevelopersFind & fix floating sunglasses bug
Test ClosureSummary Report, MetricsTest Manager, Stakeholders95% pass rate, feature approved

Key Differences: STLC vs SDLC

  • SDLC = Building the software (Development focus)
  • STLC = Verifying the software (Quality focus)

Relationship:
STLC runs parallel to SDLC phases but has its own dedicated workflow.

Best Practices for Effective STLC

  1. Early Testing: Start during requirements phase
  2. Automation: Automate regression tests
  3. Continuous Testing: Integrate with CI/CD pipelines
  4. Risk-Based: Prioritize critical functionality
  5. Metrics-Driven: Track defect density, escape rate

Conclusion

The STLC ensures systematic, comprehensive testing of features like Myntra’s Virtual Try-On. By following these phases with proper documentation and role clarity, teams can deliver high-quality software with minimal defects.

Pro Tip:
“A well-executed STLC catches bugs before your users do!”

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