Agile software devlopment unit 1

 

⭐ 1. Introduction & Background of Agile

📌 What is Agile? (VERY IMPORTANT – must write in exam)

Agile is a flexible, fast, and customer-focused software development approach that delivers the project in small parts (iterations) instead of completing everything at once.

📌 Why Agile?

Traditional model (Waterfall) → slow, rigid, changes difficult.
Agile → quick delivery, accepts changes anytime.

📌 Simple Meaning

Agile = Develop in small steps + get feedback + improve continuously.

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⭐ 2. Agile Manifesto (4 Values)

📝 You MUST remember these 4 lines. Always asked.

1. Individuals & interactions over processes & tools

2. Working software over comprehensive documentation

3. Customer collaboration over contract negotiation

4. Responding to change over following a plan

👉 Easy Trick to Remember: I – W – C – R
(Individuals, Working, Collaboration, Responding)

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⭐ 3. 12 Agile Principles (Short & Scoring Version)

(Write ANY 5–6 in exam)

1. Customer satisfaction by fast delivery

2. Welcome changes anytime

3. Deliver working software frequently

4. Close cooperation between business & developers

5. Build projects around motivated people

6. Face-to-face communication is best

7. Working software = primary measure of progress

8. Sustainable development pace

9. Continuous attention to technical excellence

10. Simplicity

11. Self-organizing teams

12. Regular reflection & improvement (Retrospective)

👉 Trick: C W D C B F W S C S S R
(You don’t need full — just write 6–7 in exam.)

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⭐ 4. Stakeholders & Challenges (Very Scoring Topic)

📌 Stakeholders in Agile

Stakeholder = anyone involved/affected in the project.
Examples:

• Customer

• Product Owner

• Developer team

• Scrum Master

• Management

📌 Challenges in Agile

Short points are enough:

• Changing requirements

• Limited documentation

• Need active customer involvement

• Requires skilled teams

• Short deadlines

• Coordination issues with distributed teams

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⭐ 5. Overview of Agile Development Models

(VERY IMPORTANT – DEFINITIONS MUST LEARN)

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✅ A. Scrum (Most Important Agile Model)

Simple definition:
Scrum is an Agile framework that works in Sprints (1–4 weeks) with defined roles, events, artifacts.

Key points (write any 3–4):

• Sprint (short cycle)

• Daily Stand-up meeting

• Product Backlog

• Scrum Master, Product Owner

• Sprint Review, Retrospective

➡️ Most scoring topic — ALWAYS asked.

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✅ B. Extreme Programming (XP)

Simple definition:
XP is an Agile method focusing on quality through continuous feedback and simple code.

Main Practices:

• Pair programming

• Test-Driven Development (TDD)

• Continuous Integration

• Frequent releases

• Refactoring

👉 Trick: P-T-C-F-R (Pair, Test, CI, Frequent release, Refactor)

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✅ C. Feature Driven Development (FDD)

Meaning:
FDD develops software by building features one by one.

Key steps:

• Build feature list

• Plan by feature

• Design by feature

• Build by feature

Simple version: Feature-based short development cycles

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✅ D. Crystal Method

Simple definition:
Crystal focuses on people, communication, and team size.
Different colors (Crystal Clear, Crystal Yellow…) based on project size.

• Lightweight

• Flexible

• Focus on team communication

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✅ E. Kanban

Simple definition:
Kanban uses a visual board to manage tasks with continuous flow (no fixed sprints).

Features:

• Kanban board

• Cards (tasks)

• WIP limits (Work In Progress limit)

👉 Best for support/maintenance projects.

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✅ F. Lean Software Development

Simple definition:
Lean comes from Toyota. Aim: Eliminate waste and deliver value fast.

7 Lean Principles (short):

• Remove waste

• Build quality

• Fast delivery

• Knowledge creation

• Defer decisions

• Respect people

• Optimize whole

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⭐ 6. Most Important Exam Questions (UNIT-I)

📌 These 100% expected in exam:

1. What is Agile? Explain Agile principles.

2. Explain Agile Manifesto (4 values).

3. Difference between Agile and Waterfall.

4. Explain Scrum framework.

5. Explain XP and its practices.

6. Explain Kanban with diagram.

7. What is Lean? Explain seven principles.

8. What is FDD? Explain its steps.

9. Stakeholders & Challenges in Agile.

If you study only these 9 — you get full marks in Unit 1.

✅ 1. Agile vs Waterfall (VERY EASY)

Just remember Waterfall = One Big Line
Agile = Many Small Circles

Waterfall:
  [Requirements] → [Design] → [Coding] → [Testing] → [Deploy]

Agile:
  (Plan → Build → Test)  (repeat)
  (Plan → Build → Test)
  (Plan → Build → Test)

✔ Easy logic: Waterfall is Straight
✔ Agile is Loops

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✅ 2. Agile Manifesto (4 Values)

Just remember IWCR
(Individuals, Working SW, Customer, Responding)

       Agile Values
  -----------------------------
  I > Process
  W > Docs
  C > Contract
  R > Plan

✔ Only 4 lines
✔ Guaranteed marks

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✅ 3. Scrum (MOST IMPORTANT – Simple Box Flow)

Just 5 boxes. Nothing more.

Product Backlog
       ↓
Sprint Planning
       ↓
   Sprint
       ↓
Review
       ↓
Retrospective

✔ Trick: P – S – S – R – R
(Product → Sprint → Sprint → Review → Retro)

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✅ 4. XP Practices (Just Remember: P–T–C–R)

Only 4 things. That’s enough.

XP:
P → Pair Programming
T → Test-driven Development
C → Continuous Integration
R → Refactoring

✔ ONLY these 4
✔ No need to remember others

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✅ 5. Kanban (Just 3 Columns)

Super easy:

To Do  →  Doing  →  Done

✔ THAT’S IT.
✔ You can draw in 3 seconds.

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⭐ FINAL SUPER-SHORT DIAGRAM LIST (Memorization Booster)

Topic	Diagram You Remember
Agile vs Waterfall	Straight line vs loops
Agile Values	IWCR 4 lines
Scrum	5-step vertical flow
XP	P–T–C–R
Kanban	ToDo → Doing → Done

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If you want, I can make a 1-page PDF with ONLY these 5 diagrams (handwritten-style, super clean).
Just say “Make 1-page diagram PDF”.