Supplier Security Policy

"Supplier assurance framework" I am not sure what would be the key points in that doc. what should i need to include in that doc.

Answer:

I am sorry but we do not have the document “Supplier assurance framework”, it is not mandatory by the standard and I am not sure what do you mean with this. To see a complete list of mandatory documents (and non mandatory), please read this article “List of mandatory documents required by ISO 27001 (2013 revision)” : https://advisera.com/27001academy/knowledgebase/list-of-mandatory-documents-required-by-iso-27001-2013-revision/
If your question is related to the supplier security, this article can be interesting for you “6-step process for handling supplier security according to ISO 27001” : https://advisera.com/27001academy/blog/2014/06/30/6-step-process-for-handling-supplier-security-according-to-iso-27001/ 
Finally keep in mind that the unique mandatory document related to the supplier security is the “Supplier Security Policy” (clause A.15.1.1 of the Annex A of the ISO 27001:2013).