> For the complete documentation index, see [llms.txt](https://docs.workersforlabview.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.workersforlabview.io/fundamental-concepts/initialization-sequence.md).

# Initialization Sequence

Workers in an application's call-chain are initialized from the top down, with the initialization of each Worker cascading down the Worker call-chain hierarchy.

When a Worker has been initialized, it notifies its Caller. This confirmation comes from the bottom up, in a **reverse** cascade back up the Worker call-chain hierarchy.

The following flowchart explains the initialization sequence of a Workers application.

![Initialization sequence of a Workers application (note: Manager means Caller in this diagram)](/files/QW4yZCjMafWqwkqyGUp1)