Place order for spare part in Parts Catalog from Mobility

Content

Hi,

The document for Parts Catalog says: 

It enables the technician to look up the spare part required for replacement, discuss the replacement terms (price, period, etc.) with the customer and place an order for the spare part.

I understand that parts catalog is available globally and not per activity basis, but, how can the technician place an order for the spare part that may be required for activity completion? 

Thanks,

Megha