1. Software Development Life Cycle (SDLC) – Demystified!
Bhanu Bahl, PhD.
Director, Informatics Program Management
Harvard Catalyst

2. SDLC starts with an idea…
“We need a tool to help researchers share and search…” A web-based application to collect and share information

3. What is SDLC?
SDLC, Software Development Life Cycle is a process to design, develop and test software. - “begin with the end in mind” - It is kind of like building a house !

4. Upgrade old software vs build a new
If the architecture/foundation is outdated and application legacy code requires lot of refactoring– better to get rid of it and build anew! Money Pit (1986) movie -

5. SDLC Phases Project Initiation Requirements Design Development Testing
Authorization rules
Business Rules
Notifications
Workflow
Form Content
Design
Wireframes
Design Mockups
User Flows
Copy
Development
Themes
Epics
Stories
Tasks
Testing
Test Plans
Test Cases
Test Results

6. Requirements - What is needed?
What fields? How big?
Who needs to use the tool, Why?
How many users do we expect?
Who will provide the info of things to share?
How do we collect this info?
What do we do with it once it’s collected?
How do we update the information
What kind of data?
How many investigators
Are they internal or external?
Who needs to receive the applications?
What do they do with it?
Is it sensitive information? Do you need to report data out of the system?
Who uses it?

7. Stakeholder Discussion–Whiteboard Iterations

8. Design
Based on the requirements, usually more than one design approach for the product architecture is proposed
the best design approach is selected for the product.

9. Testing & Deployment
Testing activities are mostly involved in all the stages of SDLC
Deployment could happen in stages.
The software product may first be released in a limited segment and tested in the real business environment (UAT- User acceptance testing).

10. Development The programming code is generated
Different high level programming languages such as C, C++, Pascal, Java, and PHP are used for coding.
The programming language is chosen with respect to the type of software being developed.

11. Different SDLC Models
Waterfall Model
Agile Model
Spiral Model
V-Model

12. Waterfall Model

13. V-Model

14. Spiral Model

15. MAINTENANCE CUSTOMER SUPPORT
Agile Model
PROBLEM STATEMENT
VISION
REQUIREMENTS
RETIRE SYSTEM
MAINTENANCE CUSTOMER SUPPORT
DESIGN
RELEASE GO / NO GO
DEVELOPMENT
TESTING

16. Customer Satisfaction

17. Category
SDLC Roles
House Construction Roles
Management
Project Manager
General Contractors
Planners
Information Architect, User Experience Designer, Business Analyst
Building Architect
Technicians
Application Architect
The Foreman or The Structural Engineer.
Foundation
Database Architect
Cement Mason
Power
Network Engineers
Electricians
Construction
Application Developers
Builders
Finishing Touch
Front End Developer
Painter, Finish Carpenter, Stone or Tile Mason
Artists
Visual Designers
Interior Decorator
Protectors
Security Specialist, Network Administrator
and Roofers, Locksmiths and Security Experts
Quality
Quality Assurance Testers
Building Inspectors

19. So what would you like to be??