Why should calculate the tooling charge during PCB quote?

This post Angel want to discuss the tooling charge PCB quote calculate.
If you have placed some instant PCB quote online, you may find there was an option about tooling charge.

First of all you should know why calculator PCB tooling charge.

During the PCB manufacturing process, most of time produces a panel than contains several arrays or PCs board.
And when shipment most customers want receive separate PCB board, so PCB manufacturers use tooling to separate the panel or array PCB board.

The second reason is during electronic testing process.

If you have chosen a professional PCB manufacturer must use tools for testing.
Most of PCB manufacturers use special tooling for electronic testing to ensure your PCB board is OK.
Why should calculate the tooling charge during PCB quote?