XIO Sizing tool for VDI

The EMC XtremIO Sizing Tool is helpfull for us.

https://mainstayadvisor.com/go/emc

I would like to ask about a adjust parameter.

I do not understand to put into adjust "Delta Footprint and Log size (GB)" in VDI Horizin View param.

I may think that the Delta Footprint is equal to VM Provisioned Memory.

Do you have any guideline for this parameters?

Best regards,