---
title: "How does Agile SDLC differ from the traditional Waterfall model?"  
description: "How does Agile SDLC differ from the traditional Waterfall model?"  
author: "Ashutosh Patel"  
published: 2026-01-20  
updated: 2026-01-22  
canonical: https://answers.mindstick.com/qa/116293/how-does-agile-sdlc-differ-from-the-traditional-waterfall-model  
category: "software"  
tags: ["software development", "software engineering"]  
reading_time: 3 minutes  

---

# How does Agile SDLC differ from the traditional Waterfall model?

## Answers

### Answer by Ravi Vishwakarma

Agile SDLC and the traditional [Waterfall model](https://www.mindstick.com/forum/157702/explain-with-a-proper-diagram-of-the-sdlc-waterfall-model) differ mainly in **how work is planned, executed, and adapted to change**. Here’s a clear, side-by-side explanation.

## 1. Core Philosophy

## Waterfall

- Linear and sequential
- Each phase must be completed before the next begins
- Assumes [requirements](https://www.mindstick.com/articles/12850/drivers-license-requirements) are fixed and well understood upfront

## Agile

- Iterative and [incremental](https://www.mindstick.com/interview/23335/what-is-incremental-testing)
- Work is done in small cycles (sprints)
- Assumes requirements will evolve over time

## 2. Development Flow

## Waterfall Flow

- Requirements
- Design
- [Development](https://www.mindstick.com/articles/23191/vital-points-to-consider-when-seeking-a-reputable-web-design-and-development-company-in-abu-dhabi)
- Testing
- Deployment
- [Maintenance](https://www.mindstick.com/articles/333912/maintenance-made-simple-how-online-tools-enhance-property-management)
- No going back easily once a phase is finished

## Agile Flow

- Plan → Build → Test → Review → Improve (repeats every sprint)
- Continuous feedback and [improvement](https://answers.mindstick.com/qa/32074/which-state-introduces-land-improvement-schemes-act-bill-to-empower-farmers-in-state)

## 3. Requirements Handling

## Waterfall

- All requirements defined at the start
- Changes are costly and difficult later

## Agile

- Requirements evolve through the project
- Changes are welcomed, even late in development

## 4. Customer Involvement

## Waterfall

- Limited involvement after requirements phase
- Customer sees the product near the end

## Agile

- Continuous customer collaboration
- Frequent demos and feedback after each sprint

## 5. Testing Approach

## Waterfall

- Testing happens after development is completed
- Bugs discovered late in the cycle

## Agile

- Testing is continuous and integrated into each sprint
- Issues are detected and fixed early

## 6. Delivery

## Waterfall

- Single final delivery at the end of the project

## Agile

- Frequent, incremental releases of working software

## 7. Risk Management

## Waterfall

- High risk if requirements are misunderstood
- Problems surface late

## Agile

- Lower risk due to early feedback and frequent releases
- Issues identified early

## 8. Documentation

## Waterfall

- Heavy [documentation](https://answers.mindstick.com/qa/30462/what-is-documentation) upfront
- Documentation drives development

## Agile

- Lightweight, just-enough documentation
- Working software is the primary measure of progress

## 9. Team Structure

## Waterfall

- Specialized roles (analyst, developer, tester)
- Handoffs between phases

## Agile

- Cross-functional, self-organizing teams
- Collaboration over handoffs

## 10. Comparison Summary

| Aspect | Waterfall | Agile |
| --- | --- | --- |
| Process | Sequential | Iterative |
| Flexibility | Low | High |
| Change Cost | High | Low |
| [Customer Feedback](https://www.mindstick.com/blog/305669/how-to-use-customer-feedback-to-improve-product-design) | Late | Continuous |
| Testing | After development | Throughout |
| Delivery | One-time | Frequent |

## When to Use Which?

## Use Waterfall when

- Requirements are stable and well-defined
- Regulatory or compliance-heavy projects
- Small, low-uncertainty projects

## Use Agile when

- Requirements are changing or unclear
- Need fast time-to-market
- Customer feedback is critical


---

Original Source: https://answers.mindstick.com/qa/116293/how-does-agile-sdlc-differ-from-the-traditional-waterfall-model

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