SDLC or the Software Development Life Cycle is a process that produces software with the highest quality and lowest cost in the shortest time. SDLC includes a detailed plan for how to develop, alter, maintain, and replace a software system. ... Popular SDLC models include the waterfall model, spiral model, and Agile model.

1. SDLC
By Tharuka Vishwajith

2. What is a system?
A system is a collection of elements or
components that are organized for a common
purpose.

3. Steps in SDLC
• Feasibility Study
• Requirements analysis
• Design
• Implementation
• Testing
• Operations
• Maintenance

4. Feasibility Study
• Technical Feasibility
• Economical Feasibility
 Tangible Benefits
 Intangible Benefits
• Operational Feasibility
• Organizational Feasibility

5. Requirements analysis
• Functional Requirements
• Non functional Requirements

6.  Functional Requirements analyzing methods
• Interviews
• Questionnaires
• Observation
• Existing Documents and Reports Study
• Prototyping