1. SDLC – Beyond the Waterfall

2. Systems Development Life Cycle (SDLC)
Many approaches to systems development
Sequential versus Iterative Development
Understanding the difference between these two approaches is essential
Traditional Approach – Waterfall Model

3. Systems Development Life Cycle (SDLC)
Traditional Approach is sequential
Waterfall Model is a common example of a sequential approach

4. SDLC - Waterfall Model Initiation Investigation Analysis Design
Implementation
Maintenance

5. SDLC - Waterfall Model What are the limitations of this approach?
Cannot correct defects from previous stages
No Feedback
Expensive

6. Example Existing System – Analysis stage
Extensive problem analysis and Requirements gathered
Move to next stage – Design stage
Create design based on previous analysis stage
What happens if something changes!!

7. SDLC - Waterfall Model Initiation Investigation Analysis Design
Implementation
Maintenance

8. SDLC – Waterfall Model
Limitations of sequential approach has lead to the emergence of a more iterative approach

9. Traditional vs Agile Traditional Methods Waterfall Model Spiral Model
V-Model
Agile Methods
Extreme Programming (XP)
Scrum
Adaptive Software Development
Dynamic Systems Development Method (DSDM)
Feature Driven Development

10. Why Agile?
Instead of the traditional approach

11. Why Agile?
A more effective method?

12. A Possible Solution… Agile software development
Each of these iterations can be seen as miniature software projects

13. The Agile Software Development Manifesto
On February 11-13, 2001 Agile Alliance, (formed of software practitioners and consultants), formed and produced a Manifesto for Agile Software Development
Individuals and interactions over processes and tools
Working software over comprehensive documentation
Customer collaboration over rigid contracts
Responding to change over following a plan

14. People over Process
Human interactions are more important than the company’s processes and tools
Close team relationships
Close working environment

15. Working Software Frequent output of working, tested software
Keep It Simple Stupid (KISS)

16. Relationship With Customer
Reduce the risk of not meeting the terms of contract

17. Responding to Change
Contracts must be worded so as to allow change

18. So what makes an agile method?
Incremental
Cooperative

19. So what makes an agile method?
Straightforward
Adaptive

20. Agile Methods Extreme Programming (XP) Scrum
Adaptive Software Development (ASD)
Crystal Clear and Other Crystal Methodologies
Dynamic Systems Development Method (DSDM)
Feature Driven Development