Start Level 1 Node: SourcingSourcingEnd Level 1 Node: Sourcing
   Start Level 2 Node: SourcingSourcingEnd Level 2 Node: Sourcing
   Start Level 2 Node: Split Criteria for SourcingSplit Criteria for SourcingEnd Level 2 Node: Split Criteria for Sourcing
   Start Level 2 Node: Procurement of External RequirementsProcurement of External RequirementsEnd Level 2 Node: Procurement of External Requirements
      Start Level 3 Node: Procurement of External Requirements: How it WorksProcurement of External Requirements: How it WorksEnd Level 3 Node: Procurement of External Requirements: How it Works
   Start Level 2 Node: Assigning Existing Sources of SupplyAssigning Existing Sources of SupplyEnd Level 2 Node: Assigning Existing Sources of Supply
   Start Level 2 Node: Quota ArrangementsQuota ArrangementsEnd Level 2 Node: Quota Arrangements
   Start Level 2 Node: Sourcing Using Supplier ListsSourcing Using Supplier ListsEnd Level 2 Node: Sourcing Using Supplier Lists
   Start Level 2 Node: RFxRFxEnd Level 2 Node: RFx
   Start Level 2 Node: Live AuctionsLive AuctionsEnd Level 2 Node: Live Auctions
   Start Level 2 Node: SAP Bidding EngineSAP Bidding EngineEnd Level 2 Node: SAP Bidding Engine