Basics of Software Engineering Agile Methodology and DevOps Process

Traditional Approach to Software Development

Uses a linear approach

Where the stages of the software development process must be completed in a sequential order

The first stage must be completed before the next one begins

These stages usually comprise the following:

• Requirements gathering and documentation
• System design
• Code and unit testing
• System testing
• User acceptance testing
• Bug fixes
• Product delivery

Types of Traditional Software Development Model

• Waterfall model
• Spiral model
• V-Model

Waterfall Model

• Known as the linear cycle
• is a process that is built around planned work
• mostly suited to projects with clearly defined requirements

clearly outlines a series of steps or phases

Spiral Model

• Combining elements of design and prototyping-in-stages
• Combines the features of the prototyping and the waterfall model
• The spiral model is intended for large, expensive and complicated projects
• Advantages of top-down and bottom-up concepts
• Consists of four main phases;
• Planning
• Risk Analysis
• Engineering
• Evaluation

V-Model

• The V-model is an extension of the waterfall model.
• Show the relationships between development phases and test phases
• Time and project completeness vs. level of abstraction