10 Supply Chain Interview Questions With Worked Answers
Practise supply chain interviews on shortages, inventory discrepancies, safety stock, supplier decisions, forecasts and delivery metrics.
Supply chain answers should explain the service objective, constraint and trade-off behind a decision. These ten fictional scenarios cover planning and operations. Choose examples relevant to the advertised role instead of claiming expertise across procurement, manufacturing and logistics from a single project.
Prepare one measurable example
Describe a shortage, stock discrepancy or delivery issue you helped resolve. Define the metric and period, explain your own action and identify any cost or service trade-off. If your example is coursework, label the assumptions and distinguish the model result from a production outcome.
Interview questions & answers
Planning
1.A supplier reports a delay on a critical component. What do you do?
Confirm the affected orders, available stock, realistic recovery date and customer commitments. Compare approved alternatives, rescheduling and allocation options with the responsible teams. Explain the cost and service trade-offs before agreeing a plan. Do not promise an expedited delivery until supply and transport are confirmed.
Inventory
1.What is safety stock for?
Safety stock provides a buffer against uncertainty such as demand or supply variation. Its level should reflect the relevant service objective, variability, lead time and assumptions. ASCM discusses this purpose and the limits of simplistic rules of thumb. A fixed percentage of stock is not automatically suitable for every item.
2.The system shows 120 units but the count is 108. What would you check?
Confirm the item, location, unit of measure and count method, then review receipts, picks, transfers, returns and timing. Preserve the discrepancy while investigating. Obtain the required approval for an adjustment and address the cause. Correcting the balance without understanding repeated errors can hide a process problem.
Planning
1.A forecast was wrong. How do you assess it?
Check the forecast horizon, actual-demand definition and whether stockouts or exceptional events distorted the comparison. Separate systematic bias from variable error and examine relevant segments. Explain the measure used and the decision it supports. One inaccurate week does not establish that the entire forecasting method is unusable.
Procurement
1.Would you always choose the lowest-priced supplier?
Compare the relevant total cost, quality, lead time, reliability, capacity and risk under the sourcing process. A lower unit price may create more rework, inventory or delivery expense. State the assumptions and evidence behind the comparison, and involve the appropriate technical and commercial owners.
Logistics
1.How would you investigate a fall in on-time delivery?
Define what “on time” means, including the promised date and permitted window. Segment late orders by cause, route, supplier or process step and check data quality. Separate dispatch delays from transport delays. Choose an action that addresses the evidenced constraint and monitor whether service improves.
Metrics
1.Nine of 100 orders were late and four of the remaining orders were incomplete. What is OTIF?
If OTIF means orders that were both on time and in full, 87 of the 100 orders qualify, or 87%. The wording specifies that the four incomplete orders are among those that were on time, so the failures do not overlap. In real data, confirm the denominator and avoid double-counting orders that fail both tests.
Inventory
1.How would you reduce slow-moving stock?
Identify the affected items, ageing, demand outlook and constraints such as expiry or customer commitments. Review purchasing and planning causes, then compare approved actions such as redeployment or adjusted replenishment. Do not reduce stock indiscriminately if it protects a justified service or maintenance requirement.
Coordination
1.Sales wants more stock while finance wants less. How do you respond?
Translate the disagreement into service targets, demand uncertainty, working capital and cost. Compare a small set of scenarios using the same assumptions and make the trade-offs visible. Agree the decision owner and review point. Neither maximum availability nor minimum inventory is a complete objective on its own.
Experience
1.How would you describe an improvement without overstating it?
State the baseline, period, data source and your contribution. If delivery performance improved after several changes, explain that you helped with one of them rather than claiming sole causation. Include the relevant cost or quality measure so an apparent improvement does not conceal an offsetting problem.
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