Core Domain Concepts & Structural Topology

The Purchases & Procurement domain organizes supplier relationships, item sourcing attributes, and spending controls into a structured topology that supports flexible yet governed procurement operations.

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1. Vendor & Supplier Hierarchy

The supplier master data is organized as a layered hierarchy to support multi-site procurement, localized contacts, and currency-specific trading terms:

Vendor Organization
└── Vendor Site / Branch
    └── Vendor Contact
        └── Currency & Payment Term Profile

Level	Purpose
Vendor Organization	The legal entity or supplier company with which the enterprise contracts.
Vendor Site / Branch	A physical or logical operating location of the vendor (factory, depot, sales office).
Vendor Contact	A named individual associated with a site for sales, support, or quality matters.
Currency & Payment Term Profile	Trading rules per vendor/site combination: default currency, Incoterms, payment terms, and bank details.

Vendor Status Lifecycle

Status	Meaning
Prospect	Under evaluation; not yet authorized for purchases.
Approved	Cleared compliance checks and authorized for standard procurement.
Preferred	Demonstrated strong performance and eligible for strategic sourcing.
On-Hold	Temporarily blocked due to quality or compliance concern.
Blacklisted	Permanently disqualified from receiving new commitments.

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2. Item Purchasing Profiles

Each item that can be procured carries a purchasing profile defining how it is sourced from suppliers:

Attribute	Definition
Supplier Part Number	The vendor’s own identifier for an item, distinct from the internal SKU.
Minimum Order Quantity (MOQ)	The smallest quantity a supplier will accept on a single order line.
Packaging Unit	The standard physical container (box, pallet, case) used by the supplier.
Purchasing Unit of Measure (UOM)	The unit in which procurement quantities are expressed and priced.
UOM Conversion Factor	The ratio between purchasing UOM and inventory UOM (e.g., 1 pallet = 48 units).
Supplier Lead-Time Matrix	Lead time per vendor/site combination, potentially segmented by geography or seasonality.

Sourcing Rules

• A single item may have multiple approved suppliers, each with its own purchasing profile.
• The system can suggest the optimal supplier based on lead time, landed cost, and historical performance.
• MOQ and packaging-unit constraints are enforced at PO line validation.

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3. Approval Matrix Topology

Procurement commitments are governed by a multi-dimensional approval matrix that routes documents to authorized approvers based on spending risk:

Dimension	Example Values
Organizational Hierarchy	Department, Division, Business Unit
Cost Center	Engineering, Operations, Marketing
Budgetary Commitment	Capital Expenditure (CapEx), Operational Expenditure (OpEx)
Monetary Threshold	Amount bands triggering different approval tiers
Commodity Category	Raw Materials, IT Services, Office Supplies

Approval Escalation

Document Type	Threshold	Required Approval
Purchase Requisition	Up to $1,000	Direct Manager
Purchase Requisition	$1,001 – $10,000	Department Head
Purchase Order	$10,001 – $50,000	Procurement Director
Purchase Order	Above $50,000	CFO or Board Delegate

Approval rules are cumulative: a high-value PO may require sign-off from multiple tiers before authorization.