What Implementation and Migration element can be used to model sub-projects or tasks within a...

Comprehensive and Detailed in Depth Explanation:AWork Packageis anImplementation and Migrationelement in ArchiMate that represents aseries of actions designed to achieve a specific goal within a defined period. It is used tomodel sub-projects, tasks, projects, and programsas it captures the work needed to realize a specific aspect of an architecture.

TheArchiMate 3.2 Specificationexplicitly defines aWork Packageas an element that structures and organizes the necessary activities within aproject, program, or portfolio.

References:

Archi User Guide​

ArchiMate 3.2 Specification