Abstract: A managerial-level user can add and specify tasks to define an activity flow using an interactive tool. The activity flow is stored as a building block that is accessible by a process application. A process administrator can insert the activity flow into a stage of a lifecycle of an entity using the process application. The process application may add a reference to the entity to an activity flow definition file associated with the building block stored in the database such that, at runtime of the lifecycle, the activity flow specified by the managerial-level user is automatically executed in the stage of the lifecycle. The process administrator does not need to know how the activity flow was built. The managerial-level user does not need to know how the activity flow is inserted into the lifecycle or how any of its stages work. The activity flows can be customized and reused.