Hey, I'm creating a system in zoho crm but there's a confusion in the flow how It can be developed into the zoho crm. 
 We provide a medical equipment service. Every time a client need a product so we've to get first prescription from the doctor when the product approved by the office so then I'll be sent to customer as a quotation. There will be multiple products and are not send in the same quotation. E.g. There are 3 products and one can be send this week other two will be send after 2 months and client can reject any of the product. Please share your views If you have any Idea. Thank you 

 - Process might be something like this --> Lead + products --> contact + products --> approval process --> books Quotation--> Invoice