Review questions

Review questions

Test your understanding with these questions. Marking and saved results are available with a free account.

1. Question 1A sponsor wants to “fix delays.” Orders include domestic standard orders and cross-border custom orders. The service dashboard uses invoice time, while complaints concern customer receipt. Which engagement question should come before proposing a remedy?

   Buy tracking for every shipment, then count invoices issued. For a defined period, inspect domestic standard orders from original promise to proof of receipt, then compare delay mechanisms and options within sponsor authority. Pool all orders into one mean because a large sample removes segment differences. Assign responsibility to the supplier unless disproved because sourcing comes first.
2. Question 2An order was confirmed at 08:00, its label printed at 08:15 and carrier receipt scanned at 16:30. There is no packing-complete timestamp. A manager claims the warehouse lost 8 hours 15 minutes. What is the most defensible conclusion?

   The claim is established because the label-to-scan interval is entirely warehouse work. Transport is the cause because the scan happened in the afternoon. The observed interval is 8 hours 15 minutes, but splitting it between warehouse and carrier waits requires parcel-ready and handover events. No interval can be calculated without customer proof of receipt.
3. Question 3Of 200 orders, 170 are confirmed on time, 15 late and 15 lack proof of receipt. What is the possible on-time rate across all orders without assuming the missing cases' status?

   85% to 92.5%. Exactly 91.9% because missing cases must leave the denominator. Exactly 85% because every missing record means a late order. Exactly 92.5% because no late event was recorded.
4. Question 4Lateness rises during a promotion as heavy-item mix increases and a carrier changes in some regions. Which test best distinguishes packing-capacity and carrier explanations?

   Compare only the overall mean before and after the promotion. Ask the packing manager which cause feels most convincing and accept it. Count packers and carrier vehicles; the larger number reveals the cause. Compare pre-handover time within the same product and post-scan time within comparable region and service groups.

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