hint *Explain SD and MM Flow?

SD FLOW:
Enquiry(VA11)-->Quotation(VA21)-->Sales Order(VA01)-->Delivery Order(VL01)-->Billing(VF01)


MM FLOW:
Purchase Requisition(ME51)-->Request for Quatation(ME41)--> Quotation from Vendors(ME47)-->Price Comparision (ME49)-->Purchase Order send to Vendors(ME22)-->Goods Reciepts(MIGO)-->Logistic Invoice Verification(MIRO)-->Vendor's Payment