Software Development Processes (SDLC Models)

Introduce the foundation of software development processes, mapping the lifecycle with simple terms and analogies, while overviewing classic models and common industry challenges.

Define the software development life cycle as a linear series of stages from phase a through phase e, ending in maintenance with potential enhancements.

The waterfall model presents disadvantages: rigid, unchangeable requirements and delayed testing after coding, leading to wasted resources; changing requirements and upfront technology decisions hinder project adaptability.

Explore how business requirements define a software product by distinguishing functional and non-functional needs, with examples like bill payment and user experience, system, geo location, availability, and backups.

The lecture examines the disadvantages of the V model, noting that clear, complete requirements are rarely practical and changing requirements make rigid, waterfall-like processes unsuitable.

Compare the V model to the waterfall model, noting testing phases and design and testing alignment, and its suitability for small projects, not for complex or large ones.

Shows how iterative development struggles with incomplete or changing requirements, forcing architecture rework, technology choices, and extra time and resources; each iteration can resemble a rigid waterfall.

Explore the spider model in this module, delving into iterations and phases, and weighing advantages and disadvantages before concluding with a brief summary video.

Discover how the spiral model embeds risk management into multiple iterations, emphasizes prototypes, benchmarks, and simulations, and is ideal for large, complex applications and product mix companies.

Explore the rational unified process, a configurable, disciplined software development framework built on six best practices, four phases, and nine workflows. It uses UML modeling, artifacts, and templates.

Define and validate project scope through the four RUP phases—initiation, elaboration, construction, and transition—driving milestones, use-case models, architecture decisions, and executable prototypes.

Explore the disadvantages of the rational unified process, including its unsuitability for small projects, excessive complexity, and heavy reliance on artifacts and UML diagrams.

Explore the iterative rational unified process, emphasizing its customizable four phases (Inception, elaboration, construction, transition) and nine workflows with multiple iterations for large projects.

Explore agile fundamentals, from what is agile to the agile manifesto, outlining its principles, practices, and the advantages and disadvantages in a two-part module roadmap.

Highlight the disadvantages of agile, including architectural challenges with changing requirements, pressure on developers and scrum masters, potential scope creep, ripple effects on architecture, and higher costs from larger teams.

Cover the five XP rules—planning, managing, designing, coding, and testing—highlighting iterative release planning, sustainable velocity, CRC cards, spike solutions, refactoring, and test-driven development.

Explore XP activities—coding, testing, listening, and designing—emphasizing simple, clear code and test driven development, with listening to customers guiding design.

Explore the disadvantages of extreme programming (xp), including its code-centric focus, minimal design emphasis, undocumented defects, and the pressure on globally distributed teams.

Explore extreme programming principles and activities—coding, testing, listening, and designing—driven by simplicity, rapid feedback, and continuous improvement, including paid programming and test driven development.