Start Level 1 Node: BillingBillingEnd Level 1 Node: Billing
   Start Level 2 Node: Billing ScenariosBilling ScenariosEnd Level 2 Node: Billing Scenarios
      Start Level 3 Node: Delivery-Related BillingDelivery-Related BillingEnd Level 3 Node: Delivery-Related Billing
   Start Level 2 Node: ServicesServicesEnd Level 2 Node: Services
      Start Level 3 Node: PricingPricingEnd Level 3 Node: Pricing
      Start Level 3 Node: Partner ProcessingPartner ProcessingEnd Level 3 Node: Partner Processing
      Start Level 3 Node: Text ProcessingText ProcessingEnd Level 3 Node: Text Processing
      Start Level 3 Node: Action ProcessingAction ProcessingEnd Level 3 Node: Action Processing
   Start Level 2 Node: Item Category DeterminationItem Category DeterminationEnd Level 2 Node: Item Category Determination
   Start Level 2 Node: Billing Due ListBilling Due ListEnd Level 2 Node: Billing Due List
      Start Level 3 Node: Release of Blocked Billing Due List ItemsRelease of Blocked Billing Due List ItemsEnd Level 3 Node: Release of Blocked Billing Due List Items
      Start Level 3 Node: Analysis of Incomplete Billing Due List ItemsAnalysis of Incomplete Billing Due List ItemsEnd Level 3 Node: Analysis of Incomplete Billing Due List Items
   Start Level 2 Node: Billing ExecutionBilling ExecutionEnd Level 2 Node: Billing Execution
      Start Level 3 Node: Collective BillingCollective BillingEnd Level 3 Node: Collective Billing
      Start Level 3 Node: Scheduled Billing in the BackgroundScheduled Billing in the BackgroundEnd Level 3 Node: Scheduled Billing in the Background
      Start Level 3 Node: Billing in SAP GUIBilling in SAP GUIEnd Level 3 Node: Billing in SAP GUI
      Start Level 3 Node: Direct BillingDirect BillingEnd Level 3 Node: Direct Billing
      Start Level 3 Node: CancellationCancellationEnd Level 3 Node: Cancellation
      Start Level 3 Node: Retroactive BillingRetroactive BillingEnd Level 3 Node: Retroactive Billing
      Start Level 3 Node: Difference CalculationDifference CalculationEnd Level 3 Node: Difference Calculation
   Start Level 2 Node: Additional Billing FunctionsAdditional Billing FunctionsEnd Level 2 Node: Additional Billing Functions
      Start Level 3 Node: Condition-Based Invoice SplitCondition-Based Invoice SplitEnd Level 3 Node: Condition-Based Invoice Split
      Start Level 3 Node: Supplementary InvoicesSupplementary InvoicesEnd Level 3 Node: Supplementary Invoices
      Start Level 3 Node: Intercompany BillingIntercompany BillingEnd Level 3 Node: Intercompany Billing
   Start Level 2 Node: Billing PlansBilling PlansEnd Level 2 Node: Billing Plans
      Start Level 3 Node: Milestone Billing PlanMilestone Billing PlanEnd Level 3 Node: Milestone Billing Plan
   Start Level 2 Node: Output of Billing DocumentsOutput of Billing DocumentsEnd Level 2 Node: Output of Billing Documents
   Start Level 2 Node: IntegrationIntegrationEnd Level 2 Node: Integration
      Start Level 3 Node: Data Transfer to SAP CRM via External InterfaceData Transfer to SAP CRM via External InterfaceEnd Level 3 Node: Data Transfer to SAP CRM via External Interface
      Start Level 3 Node: Data Exchange with SAP ERP for Delivery-Related BillingData Exchange with SAP ERP for Delivery-Related BillingEnd Level 3 Node: Data Exchange with SAP ERP for Delivery-Related Billing
      Start Level 3 Node: Data Transfer to SAP ERP AccountingData Transfer to SAP ERP AccountingEnd Level 3 Node: Data Transfer to SAP ERP Accounting
      Start Level 3 Node: Data Exchange with SAP Global Trade ServicesData Exchange with SAP Global Trade ServicesEnd Level 3 Node: Data Exchange with SAP Global Trade Services
      Start Level 3 Node: Data Transfer to SAP NetWeaver Business IntelligenceData Transfer to SAP NetWeaver Business IntelligenceEnd Level 3 Node: Data Transfer to SAP NetWeaver Business Intelligence
   Start Level 2 Node: Billing of ServicesBilling of ServicesEnd Level 2 Node: Billing of Services
      Start Level 3 Node: External Billing of Service Transactions in SAP ECCExternal Billing of Service Transactions in SAP ECCEnd Level 3 Node: External Billing of Service Transactions in SAP ECC
   Start Level 2 Node: Archiving of Billing DocumentsArchiving of Billing DocumentsEnd Level 2 Node: Archiving of Billing Documents
   Start Level 2 Node: Country-Specific FunctionsCountry-Specific FunctionsEnd Level 2 Node: Country-Specific Functions
      Start Level 3 Node: Official Document NumberingOfficial Document NumberingEnd Level 3 Node: Official Document Numbering
         Start Level 4 Node: Identical Numbering of Cancellation DocumentsIdentical Numbering of Cancellation DocumentsEnd Level 4 Node: Identical Numbering of Cancellation Documents
         Start Level 4 Node: Numbering of Accounting DocumentsNumbering of Accounting DocumentsEnd Level 4 Node: Numbering of Accounting Documents
      Start Level 3 Node: Generation of Payment Reference NumbersGeneration of Payment Reference NumbersEnd Level 3 Node: Generation of Payment Reference Numbers
      Start Level 3 Node: Billing Document SplitBilling Document SplitEnd Level 3 Node: Billing Document Split
      Start Level 3 Node: Generation of Negative Postings in FI-ARGeneration of Negative Postings in FI-AREnd Level 3 Node: Generation of Negative Postings in FI-AR