What Are the Six Systems?
- Accounting system: Records direct and indirect costs, maintains financial records, and supports contract-level financial reporting.
- Estimating system: Develops and documents cost estimates used for proposals, pricing, forecasting, and contract changes.
- Purchasing system: Controls procurement activities, supplier selection, purchase approvals, subcontract administration, and purchasing documentation.
- Material management and accounting system: Tracks material acquisition, inventory, usage, costs, and related contract information.
- Earned value management system: Integrates cost, schedule, and technical performance information for applicable contracts.
- Government property system: Maintains accountability and records for government property held or managed by the contractor.
These systems are most effective when their procedures, data structures, approvals, and reporting mechanisms work together rather than operating as isolated functions.
How the Six Systems Work Together
A contractor may begin with an estimate, convert the estimate into a contract budget, procure materials or subcontracted services, record costs, measure performance, and report financial results. The six systems provide controls across this lifecycle.
For example, purchasing information can flow into material records and accounting transactions, while project schedules and budgets can feed earned value reporting. Government property records can connect asset information with contracts and responsible personnel.
Integrated Business Systems provide a useful framework for understanding how accounting, procurement, project, inventory, and reporting applications exchange information across business workflows. Integration helps preserve consistency between operational events and financial records.
For contractor-specific workforce and supplier processes, Contractor Nexus can also be considered alongside broader systems that connect contractor relationships, operational information, and financial administration.
Accounting, Estimating, and Purchasing Controls
The accounting system establishes the financial record used to track contract costs and support reporting. Effective accounting controls distinguish direct and indirect costs, apply appropriate account classifications, and preserve supporting documentation.
The estimating system supports proposal development and forward-looking cost analysis. Its inputs should be traceable to historical information, labor assumptions, material requirements, subcontract estimates, and other relevant cost drivers.
The purchasing system connects procurement decisions with approved requirements and supplier commitments. Contractor invoice administration is an important downstream activity, and the Contractor Invoice Guide can provide educational guidance on creating, managing, and automating contractor invoices.
For organizations operating across several entities, Multi Entity Support can help procurement workflows provide a unified view of tasks, documents, and approvals across entities and ERP systems.
Material, Performance, and Property Management
Material management and accounting connects physical resources with financial records. Contractors need visibility into material receipts, inventory balances, issues, consumption, and associated costs so contract reporting remains aligned with operational activity.
Earned value management brings together planned work, actual costs, and completed work to measure contract performance. It gives program and finance teams a structured basis for comparing budgeted expectations with actual progress.
Government property controls focus on identification, custody, records, accountability, and disposition of government-owned assets. These records should remain traceable to responsible personnel, locations, contracts, and relevant transactions.
Vendor controls can span several of these areas. Multi-Entity Vendor Management supports vendor workflows across multiple entities and ERP environments, providing a unified view of vendor tasks and related data.
ERP Integration and Contractor Business Systems
Modern contractors frequently use ERP platforms to connect accounting, purchasing, projects, inventory, and reporting. ERP architecture therefore has a direct effect on how information moves between the six business-system areas.
Resources such as Top ERP Systems by Industry 2025 – Compare, Rank & Win can help organizations understand differences among ERP platforms when planning integration, migration, or finance-system expansion.
Individual ERP environments may require different integration approaches. For example, netsuite can serve as a central financial platform around which procurement, contractor, reporting, and finance workflows are extended.
How ERP and Business Processes Work Together is useful for understanding how ERP functionality aligns with operational processes, including how shared data and workflows can improve operational efficiency.
Payment and reconciliation processes should also remain connected to the financial system. Reconciliation Of Bank Statements can match invoices with bank transactions, identify discrepancies, and update ERP records to support accurate cash flow information.
Contractor Workforce and Transaction Controls
Contractor business systems can interact with workforce administration, supplier records, tax reporting, and payment workflows. 1099 Contractor Management addresses the administration of independent contractors and related financial and compliance information, complementing broader contractor accounting processes.
Invoice workflows should maintain a clear connection between source documentation, validation, approval, accounting classification, and payment. Automated Rajection And Acceptance Of Invoices can provide vendors with real-time status information about invoice rejections or corrections through an integrated vendor portal.
When payments span multiple entities and ERP environments, ERP Integration for Enterprise Payment Processing can support unified vendor payments, automated transaction processing, and enterprise-wide payment visibility.
Best Practices for Managing the Six Systems
- Define clear ownership for each business-system area and document key responsibilities.
- Maintain consistent data definitions across accounting, procurement, projects, inventory, and reporting.
- Connect approvals to documented authority levels and contract responsibilities.
- Reconcile operational transactions with financial records and investigate material discrepancies.
- Maintain traceable documentation for estimates, purchases, costs, performance measurements, and property.
- Test ERP integrations and system changes to confirm that critical controls and data flows continue to operate correctly.
Strong governance also requires periodic review of procedures, system configurations, user responsibilities, reports, and interfaces. These reviews help keep the six business systems aligned with contract requirements and current operating practices.
Summary
Six Contractor Business Systems cover accounting, estimating, purchasing, material management and accounting, earned value management, and government property. Their coordinated operation helps contractors maintain reliable financial information, controlled procurement, traceable resources, measurable contract performance, and accountable property records.