Can you name the main software development lifecycle models you have encountered?

Main software development life cycle models that are commonly encountered:

• Waterfall Model — sequential execution of phases: requirements analysis, design, implementation, testing, deployment. Each phase is completed fully before moving to the next.

• Incremental Model — development of the product in parts (increments), each adding functionality. Allows for faster delivery of a working version.

• Spiral Model — combines iterative approach with risk analysis. Each iteration goes through planning, risk analysis, development, and evaluation.

• Agile Methodology — focused on rapid adaptation to changes, frequent releases, close interaction with the customer. Examples: Scrum, Kanban.

• V-Model — extension of the Waterfall model, where testing phases correspond to development phases, enhancing quality.

The choice of model depends on the project requirements, scale, and specifics.