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RAD - Model
Rapid Application Development
History of the RAD - Model
The RAD model was formally introduced in the early 1990s by James Martin
He explained it in his book:
📘 Rapid Application Development (1991)
RAD became popular when businesses needed software
quickly due to fast market changes.
Why Was RAD Created?
Traditional models like the Waterfall model were:
❌ Time-consuming
❌ Difficult to change
❌ Slow to deliver
❌ Documentation-heavy
Companies wanted:
✅ Faster delivery
✅ Early working prototypes
✅ Flexible requirement changes
✅ Active user involvement
So RAD was introduced to speed up development.
Phases of RAD Model
RAD has 4 main phases:
1️⃣ Requirements Planning
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Discuss project goals
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Identify requirements quickly
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High-level planning
2️⃣ User Design
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Create prototypes
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Get user feedback
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Modify design based on feedback
3️⃣ Construction
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Rapid coding
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Component reuse
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Parallel development
4️⃣ Cutover
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Testing
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Deployment
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User training
Definition RAD - Model
RAD Model is a fast SDLC approach that uses prototyping and continuous user feedback to quickly develop and deliver software.
Purpose of the RAD -Model
The main purpose is:
The main purpose is:
To deliver software quickly
To reduce development time
To involve users heavily
To adapt quickly to changes
It is ideal when:
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Requirements are moderately clear
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Project timeline is short
-
Skilled developers are available
Real-Life Example
Imagine developing a College Management System:
🔹 Week 1 → Prototype of login & dashboard
🔹 Week 2 → Student module
🔹 Week 3 → Attendance system
🔹 Week 4 → Reports & final deployment
Users continuously check and give feedback.
Advantages and Disadvantages
✅ Fast development
✅ Continuous user involvement
✅ Early working system
✅ Flexible to change
❌ Not suitable for large complex systems
❌ Requires skilled team
❌ Heavy user involvement needed
❌ Not ideal for high-risk projects
✅ Advantages
❌ Disadvantages
RAD MODEL
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