5 ways GitLab pipeline logic solves engineering problems

GitLab's pipeline execution model offers five composable patterns for handling real-world CI/CD complexity: (1) Parent-child pipelines with DAG execution for monorepos, enabling selective rebuilds and parallel job execution; (2) Multi-project pipelines for microservices across repos, making cross-service dependencies visible and testable; (3) Dynamic child pipelines for multi-tenant/matrix deployments, generating pipeline YAML at runtime to avoid config duplication; (4) MR-first delivery using merge request pipelines, merged results pipelines, and workflow rules to run the right tests at the right time; and (5) CI/CD Components for governed pipelines, letting platform teams publish versioned reusable building blocks that application teams consume with a single include line. Each pattern is illustrated with working YAML configurations and real engineering scenarios.