Supply chain glossary

Procurement terms, in plain English.

Clear definitions and practical context for procurement, supplier operations, logistics, and AI.

61 terms across 6 topics

Sourcing & buying

The requests, decisions, and buying motions behind a purchase.

Procurement

The broader process of defining a need, selecting suppliers, buying, and managing delivery and supplier performance. Procurement includes sourcing and purchasing, but also the controls and relationships around them.

Related guide: Procurement vs. purchasing vs. sourcing

Sourcing

The work of finding, evaluating, selecting, and negotiating with suppliers for a business need. Sourcing happens before and around the transaction; it is more than placing an order.

Related guide: Procurement vs. purchasing vs. sourcing

Purchasing

The transactional work of ordering and acquiring goods or services from a supplier. It commonly covers requisitions, approvals, purchase orders, receipts, and order changes.

Related guide: Procurement vs. purchasing vs. sourcing

Direct procurement

Buying the materials, components, and services that become part of a company’s product. A robotics company’s motors, fasteners, and custom enclosures are direct spend.

Related guide: Direct vs. indirect procurement

Indirect procurement

Buying goods and services that support the business but do not become part of what it sells. Office supplies, software, and facility services are common examples.

Related guide: Direct vs. indirect procurement

RFI (request for information)

A structured request used to learn what suppliers can provide before asking for a formal proposal or price. An RFI helps a buyer understand capabilities, certifications, and fit during early research.

Related guide: RFI, RFP, and RFQ

RFP (request for proposal)

A request that asks suppliers to propose an approach, scope, and commercial offer for a defined need. An RFP is useful when the buyer is comparing solutions, not just unit prices.

Related guide: RFI, RFP, and RFQ

RFQ (request for quotation)

A formal request for a supplier’s price, lead time, and terms on a defined scope of work or parts. A good RFQ gives every supplier the same inputs so quotes can be compared fairly.

Related guide: What is an RFQ?

RFQ package

The documents a buyer sends with an RFQ so every supplier prices the same scope. It typically includes drawings, specifications, quantities, required dates, delivery terms, and a quote template. An incomplete package produces quotes that can’t be compared.

Related guide: What is an RFQ?

Supplier quote comparison

The process of normalizing supplier responses so a buyer can compare price, timing, terms, and risk on equal footing. It prevents a low unit price from hiding a longer lead time or higher freight cost.

Related guide: How to compare supplier quotes

Procurement automation

Using software to carry out repeatable procurement work, from supplier outreach and data capture to approvals and follow-up. The goal is fewer manual handoffs while people keep control of decisions and exceptions.

Related guide: The business case for procurement automation

Purchase requisition

An internal request to approve a purchase before an order is issued to a supplier. A requisition usually records what is needed, why it is needed, the expected cost, and the budget owner.

Related guide: Procurement workflow examples

Minimum order quantity (MOQ)

The smallest quantity a supplier will accept for a production run or order. A lower unit price can still be a poor deal if the MOQ creates excess inventory or ties up cash.

Related guide: How to compare supplier quotes

Total cost of ownership (TCO)

The full cost of buying and using something over time, not just its quoted price. For direct materials, TCO can include freight, duties, quality failures, carrying cost, tooling, and supplier management.

Related guide: How to compare supplier quotes

Landed cost

The total cost to bring a purchased item to its destination and make it available for use. It can include the item price, freight, insurance, duties, taxes, brokerage, and handling.

Related guide: Incoterms for procurement teams

Orders & delivery

The records and signals teams use to keep work moving after a buy decision.

Purchase order (PO)

A buyer’s formal authorization for a supplier to deliver specified goods or services at agreed terms. A PO turns an approved buying decision into a trackable commercial commitment.

Related guide: Purchase order automation

Open purchase order

A purchase order that still has an outstanding quantity, shipment, receipt, invoice, or other obligation. Also called an outstanding PO. Aging open POs are often the first place to look for late or incomplete supplier commitments.

Related guide: Open purchase orders

Open PO report

A report of every purchase order line with quantity still to be received, usually pulled from the ERP. Each row typically shows the supplier, item, open quantity, and requested or promised date. It is only as accurate as those dates, so a stale promise date makes a late line look on time.

Related guide: Open purchase orders

Past-due purchase order

A purchase order line whose due date has passed without the full quantity being received. State which date you measure against: a line can be late to the buyer’s requested date but still on time to the supplier’s promise date.

Related guide: PO tracking for manufacturers

PO tracking

Monitoring a purchase order from release through supplier acknowledgment, shipment, receipt, and closeout. Useful tracking surfaces changes early enough for a buyer to act before a line goes late.

Related guide: PO tracking for manufacturers

Purchase order acknowledgment

A supplier’s response confirming it received a purchase order and accepts it, rejects it, or accepts it with changes. Some teams separate it from a confirmation, which commits to quantities, prices, and dates for each line. An acknowledgment that only says “received” gives the buyer no usable promise date.

Related guide: Purchase order acknowledgment

Promise date

The date a supplier commits to for shipping or delivering a purchase order line. It differs from the requested date, when the buyer wants the goods, and from the actual ship date. Confirm whether a promise means ship or arrival, since transit time sits between them.

Related guide: Purchase order acknowledgment

Purchase order change order

A formal revision to an issued purchase order, such as a new quantity, price, delivery date, or specification. The supplier should acknowledge the change so receiving and invoice matching use the current terms. In EDI, the X12 860 carries the buyer’s change and the 865 the supplier’s response.

Related guide: After the PO is sent

Expediting

The work of getting an at-risk order delivered on time: checking status, escalating delays, and arranging faster production or freight. Premium freight adds cost, so teams usually reserve it for lines that would stop production or delay a customer.

Related guide: AI for PO follow-ups

Advance ship notice (ASN)

A message a supplier sends before goods arrive, listing what shipped, the quantities, the carrier, tracking, and expected delivery. In X12 EDI it is the 856 transaction. Suppliers without EDI often send the same details by email or on a packing list.

Related guide: After the PO is sent

OTIF (on time in full)

A delivery measure that counts an order or line as successful only if it arrives on time and in the full quantity ordered. Companies define the on-time window and target date differently, so compare OTIF only across suppliers measured the same way.

Related guide: PO tracking for manufacturers

EDI 855

The X12 electronic data interchange transaction set a supplier uses to acknowledge, change, or reject a purchase order. It works well for suppliers with EDI infrastructure, but many direct-materials suppliers still confirm POs by email.

Related guide: Purchase order acknowledgment

Lead time

The time between placing an order or request and receiving the promised goods, service, or response. Always clarify what a supplier’s lead time starts from and whether it includes transit.

Related guide: Lead time in procurement

Blanket purchase order

A purchase order that authorizes repeated purchases from a supplier over a set period or up to an agreed value. It reduces repetitive ordering work, but releases and remaining commitments still need to be tracked.

Related guide: Open purchase orders

Backorder

Demand that a supplier has accepted but cannot fulfill by the requested date because the item is not currently available. Teams should distinguish a backorder from a canceled line and agree on the revised date or an approved substitute.

Related guide: Backorders and substitutions

Safety stock

Extra inventory held to protect against uncertainty in demand, supply, or lead time. More safety stock can reduce shortage risk, but it also increases working capital and carrying cost.

Related guide: Lead time in procurement

Shipping & Incoterms

The trade rules that divide delivery work, cost, and risk between buyer and seller.

Incoterms 2020

Eleven trade rules published by the International Chamber of Commerce that divide delivery tasks, costs, and risk between buyer and seller. They do not determine price, payment terms, product ownership, or what happens if a contract is breached.

Related guide: Incoterms for procurement teams

EXW (Ex Works)

The seller makes the goods available at a named place, usually its premises, without loading them or clearing them for export. The buyer takes on most transport work, cost, and risk, which is why EXW is often better suited to domestic trade.

Related guide: Incoterms for procurement teams

FCA (Free Carrier)

The seller clears the goods for export and delivers them to the buyer’s nominated carrier or person at the named place. FCA can be used for any transport mode and is commonly appropriate for container or multimodal shipments.

Related guide: Incoterms for procurement teams

FOB (Free on Board)

The seller clears the goods for export and delivers them on board the buyer’s nominated vessel at the named port of shipment. Risk transfers once the goods are on board; FOB is for sea or inland-waterway transport, not container delivery to a terminal.

Related guide: Incoterms for procurement teams

CIF (Cost, Insurance and Freight)

The seller pays the cost and freight to the named destination port and obtains the minimum required cargo insurance. Risk still transfers when the goods are on board at the shipment port; CIF is only for sea or inland-waterway transport.

Related guide: Incoterms for procurement teams

DAP (Delivered at Place)

The seller delivers the goods ready for unloading at the named destination and bears the transport risk to that point. The buyer handles import clearance, duties, taxes, and unloading unless the contract says otherwise.

Related guide: Incoterms for procurement teams

DDP (Delivered Duty Paid)

The seller delivers the goods ready for unloading at the named destination and handles export and import clearance, duties, and taxes. DDP places the greatest delivery obligation on the seller, but local import rules can make it impractical in some countries.

Related guide: Incoterms for procurement teams

Supplier operations

The controls that make supplier relationships repeatable and accountable.

Approved supplier list (ASL)

A maintained list of suppliers that have passed a company’s requirements for quality, capability, risk, or compliance. An ASL gives buyers a trusted starting point without preventing a documented exception.

Related guide: Approved supplier lists

Approved manufacturer list (AML)

The manufacturers and manufacturer part numbers that engineering has approved for an internal part number. An AML controls who may make a part; an approved supplier list controls who you may buy from, which can include distributors of the approved part.

Related guide: Bills of materials

Master supplier list

The complete set of supplier records a company keeps, often stored as the vendor master in its ERP. Unlike an approved supplier list, it includes suppliers not approved for new purchases. Duplicate or stale records can send orders or follow-ups to the wrong contact.

Related guide: Supplier onboarding

Supplier onboarding

The process of collecting, checking, and activating the information a supplier needs to do business with a company. Typical inputs include tax details, payment terms, certifications, contacts, and banking information.

Related guide: Supplier onboarding

Supplier performance scorecard

A repeatable view of supplier results against agreed measures such as quality, delivery, responsiveness, and cost. A scorecard is most useful when its measures and review cadence are clear to both sides.

Related guide: Supplier performance scorecards

Supplier response rate

The share of requests to suppliers, such as RFQs or PO status follow-ups, that get a reply within a set time. Track response time alongside it, since a slow reply can matter as much as no reply.

Related guide: Supplier performance scorecards

3-way match

An accounts-payable control that compares a purchase order, receiving record, and supplier invoice before payment. Matching catches quantity or price differences while the transaction is still easy to investigate.

Related guide: 3-way match

Planning & process

The structures behind parts, spend, and end-to-end procurement work.

Bill of materials (BOM)

A structured list of the parts, quantities, and sometimes suppliers or revisions needed to make a product or assembly. Procurement teams use a BOM to turn a product design into a sourcing plan.

Related guide: Bills of materials

Source-to-pay (S2P)

The full procurement lifecycle, from finding and selecting a supplier through ordering, receiving, and paying. S2P is broader than a single RFQ or PO because it connects the decisions and transactions around them.

Related guide: Source-to-pay vs. procure-to-pay

Procure-to-pay (P2P)

The transactional part of procurement that starts with a purchase request and ends when the supplier is paid. P2P usually covers requisitions, approvals, POs, receipts, invoices, and payment.

Related guide: Source-to-pay vs. procure-to-pay

AI & automation

The core ideas behind AI systems that can support or carry out procurement work.

Generative AI

AI that creates new text, images, code, or other content from instructions and context. In procurement, generative AI can draft supplier messages or summarize documents, but creating content is different from taking action.

Related guide: AI for direct procurement

AI agent

A software system that uses AI, context, and tools to work toward a delegated goal and take actions across multiple steps. In procurement, an agent might read quote attachments, compare terms, and request missing information within defined controls.

Related guide: Agentic AI in procurement

Agentic AI

An approach in which AI systems can plan and carry out multi-step work toward a goal instead of only producing a response. An agentic procurement system can use tools, react to new information, and route decisions or exceptions to people.

Related guide: Agentic AI in procurement

Large language model (LLM)

An AI model trained on large amounts of text to understand and generate language. An LLM can help extract quote data or draft supplier communication, but it is not the system of record for the transaction.

Related guide: AI for direct procurement

Fine-tuning

Additional training that adjusts a pre-trained model using examples selected for a particular task or behavior. Fine-tuning can improve a specialized task, but it does not automatically connect a model to current ERP or supplier data.

Related guide: AI for direct procurement

AI evaluations (evals)

Repeatable tests that measure how an AI system performs against defined tasks, examples, and success criteria. Procurement evals might test extraction accuracy, supplier-email handling, tool selection, and whether approval boundaries are respected.

Related guide: Agentic AI in procurement

Retrieval-augmented generation (RAG)

A technique that retrieves relevant information at run time and gives it to a model as context before the model responds. RAG can ground an answer in current POs, supplier records, policies, or specifications without retraining the model on every change.

Related guide: Agentic AI in procurement

Grounding

Connecting an AI response or action to verifiable source information rather than relying only on the model’s training. A grounded procurement recommendation should trace back to the actual quote, contract, ERP record, or approved policy.

Related guide: Agentic AI in procurement

Tool calling

A capability that lets an AI model select a defined software function or API operation and provide structured inputs for it. The surrounding application—not the language model—should enforce permissions before reading an ERP record or changing a PO.

Related guide: Agentic AI in procurement

AI guardrails

Rules and technical controls that constrain what an AI system may accept, produce, access, or do. Procurement guardrails can include approval thresholds, supplier allowlists, field validation, access controls, and blocked actions.

Related guide: Agentic AI in procurement

Hallucination

An AI-generated statement that sounds plausible but is incorrect, fabricated, or unsupported by the available evidence. Grounding, validation, evals, and human review help reduce the chance that unsupported output becomes a procurement decision.

Related guide: AI for direct procurement

AI workflow

A repeatable process in which AI handles one or more steps alongside business rules, software systems, and people. A quote workflow might extract line items, flag missing fields, compare bids, and prepare a recommendation for review.

Related guide: Procurement workflow examples

Human-in-the-loop

A system design that requires a person to review, approve, or correct an AI decision at defined points. The review point should match the risk—for example, before awarding an RFQ or changing a purchase order.

Related guide: Agentic AI in procurement

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