How can we add a approval policy to an ITShop Product?

Question

For an ITShop Shop and ITShop shelf ,the approval policy being used is RTP(Shopmembership) , but for the sales product I need to add different approval policy (say HRS(shopmembership).One way to do it is by adding the approval policy to the Service item of the product but I don't want to follow that . 
 
 Is there any other way by which we can add a service policy to a product . 
 
 Please suggest

Markus Weiss-Ehlers · Answer

Maybe this part of the documentation is helpful. It explains how the system determines the effective approval policy. I think that is what you referring to, when you are saying the approval policy is not at the service item but you are able to see it at the product. 
 https://support.oneidentity.com/technical-documents/identity-manager/7.1.1/it-shop-administration-guide/25#TOPIC-666550