HyperForm _ Thermal Forming

Junta_20361

Hello experts,

I learning HyperForm for sheet metal forming simulation.

When i do HyperForm tutorial 'HF 3080: Hot Stamping Analysis', i see that the simulation was divided into 4 stages numbered from 1 to 4. 

Please refer to below images:

 

 

Also there are 4 Time History file were created in the run folder:

 

Can anyone explain for me about these 4 stages?

Or show me where can i find the information about this?

 

Thanks in advance!