Supply Chain Manager interview questions

Supply chain management coordinates the flow of materials, information, and cash from suppliers to customers.

• Upstream work covers sourcing, purchasing, and inbound supply.
• Internal work covers planning, inventory, production, and warehousing.
• Downstream work covers order fulfillment, transport, and customer delivery.
• The practical goal is reliable service at a sustainable total cost and inventory level.

Procure-to-pay starts with an approved need and ends when the supplier is paid.

• The requester raises a purchase requisition with the item, quantity, date, and cost center.
• Procurement sources or selects the supplier and issues an approved purchase order.
• Receiving records the goods or service, and accounts payable matches the receipt and invoice to the PO.
• A valid matched invoice is approved for payment under the agreed terms.

A purchase requisition is an internal request to buy, while a purchase order is the approved order sent to a supplier.

• The requisition states the business need and routes it through budget and authorization checks.
• The PO states the commercial commitment, including quantity, price, delivery date, and terms.
• A requisition can be rejected or changed before sourcing; an accepted PO may create contractual obligations.

A request for quotation asks suppliers to price a clearly defined requirement.

• It suits comparable goods or services where specifications, quantity, and delivery terms are already known.
• Suppliers usually return unit price, lead time, validity period, payment terms, and freight conditions.
• Procurement compares bids on total cost and compliance, not only the lowest unit price.

I would compare suppliers on total cost, quality, delivery capability, capacity, and risk.

• Total cost includes unit price, freight, duties, payment terms, and likely quality costs.
• Quality evidence can include defect history, certifications, samples, and corrective-action performance.
• Delivery capability covers quoted lead time, on-time history, capacity, and location.
• Financial stability, compliance, and dependence on one site or sub-supplier reveal continuity risk.

A purchase order gives the supplier an authorized, traceable instruction for what to deliver and on what terms.

• It fixes the item or service, quantity, price, delivery location, and required date.
• It creates a reference for supplier confirmation, receiving, invoice matching, and spend reporting.
• Approval controls prevent unauthorized commitments and keep purchases within budget.

I would verify the parties, item details, quantities, commercial terms, and delivery instructions before release.

• Supplier code, legal entity, currency, and buyer contact must match the approved source.
• Item number, description, specification, unit of measure, and quantity must be unambiguous.
• Unit price, taxes, payment terms, and Incoterm must match the quotation or contract.
• Ship-to address, required date, and any packaging or quality requirements must be complete.

A three-way match compares the purchase order, goods receipt, and supplier invoice before payment.

• The PO confirms what was authorized and at what price.
• The goods receipt confirms what quantity was actually received and accepted.
• The invoice must agree within set tolerances; exceptions such as excess quantity or price variance require review.

A PO change should be recorded as an approved revision so the supplier and internal records stay aligned.

• Quantity, price, or date changes can affect budget, inventory plans, and supplier capacity.
• A revision preserves the audit trail instead of hiding the change in email or a spreadsheet.
• The updated PO should be acknowledged by the supplier before delivery whenever the change affects its commitment.

Supplier master data is the controlled ERP record used to identify and transact with a supplier.

• It includes legal name, addresses, tax identifiers, contacts, currency, and payment terms.
• Purchasing fields can include lead time, Incoterm, order method, and approved purchasing organization.
• Bank-detail changes require independent verification because incorrect master data can redirect payments.

I would track delivery, quality, cost, and responsiveness with consistently defined measures.

• Delivery can be measured by on-time delivery or OTIF against the confirmed date and quantity.
• Quality can use defect rate, rejected lots, returns, or parts per million for high-volume items.
• Cost measures include purchase price variance, freight premiums, and invoice discrepancies.
• Responsiveness can track confirmation time and closure time for corrective actions.

An approved supplier meets the minimum requirements to supply an item, while a preferred supplier is the first commercial choice among approved sources.

• Approval normally follows checks for quality, compliance, capability, and required documentation.
• Preferred status can reflect stronger cost, service, capacity, or contractual terms.
• A company may keep multiple approved suppliers while directing most volume to one preferred supplier.

Safety stock is extra inventory held to absorb uncertainty in demand or replenishment.

• It protects service when demand is higher than forecast or supply arrives later than planned.
• It is separate from cycle stock, which covers expected demand between normal replenishments.
• More safety stock reduces stockout risk but increases working capital, storage, and obsolescence exposure.

Safety stock mainly depends on demand variability, lead-time variability, and the target service level.

• More volatile demand needs a larger buffer because forecast error is wider.
• Longer or less reliable replenishment lead time increases the period that inventory must cover.
• A higher target service level raises the statistical safety factor and therefore the buffer.
• Review the parameters regularly because old variability data can produce the wrong stock level.

The reorder point is the inventory position at which a replenishment order should be triggered.

• A basic formula is expected demand during lead time plus safety stock.
• Inventory position usually means on-hand stock plus open supply minus committed demand.
• The point must be updated when average demand, lead time, or the safety-stock policy changes.

The reorder point is 250 units.

• Lead-time demand is 20 units per day multiplied by 10 days, which equals 200 units.
• Adding 50 units of safety stock gives 200 plus 50, or 250 units.
• When inventory position reaches 250, the replenishment order should be triggered under this simple policy.

Cycle stock covers expected demand between replenishments, while safety stock covers uncertainty.

• If 700 units are ordered each week for predictable daily use, those 700 units are cycle stock.
• A separate buffer for late supply or demand above forecast is safety stock.
• Order quantity mainly drives cycle stock, while variability and service level mainly drive safety stock.

Supplier lead time is the elapsed time from placing or releasing an order until the material is available for use.

• It can include supplier order processing, production or picking, and readiness for dispatch.
• Transport, customs clearance, unloading, inspection, and system receipt may also be part of total replenishment lead time.
• The business must define the start and end points consistently before comparing lead-time data.

Lead-time variability makes the arrival date uncertain and increases stockout risk even when average demand is stable.

• An average of 10 days can hide deliveries ranging from 6 to 18 days.
• Planning should use actual order-to-availability history, not only the lead time stored in the ERP.
• A wider distribution may require more safety stock, a more reliable supplier, or an updated promised lead time.

A minimum order quantity is the smallest quantity a supplier will accept for one order.

• An MOQ can come from production batch size, packaging, transport economics, or administrative cost.
• If the MOQ exceeds near-term demand, average inventory and working capital rise.
• The buyer should compare the price benefit with carrying cost, shelf life, and obsolescence risk.