{"id":"ops-reorder-point-three-items-math","audience":"operations","category":"operations-work","track":"operations","technique":"verification","level":"intermediate","title":"Calculate reorder points for three items and say which to order","free":false,"task":"Your buyer wants to know what to order today. Write a prompt for plain text with three lines, \"Item A:\", \"Item B:\" and \"Item C:\", each showing the reorder point math, the on-hand quantity and ORDER or HOLD. Reorder point is daily use times lead time, plus safety stock. ORDER if on hand is at or below the reorder point. Use the latest lead time. Under 80 words.","materialLabel":"Your material (attached to your prompt automatically)","material":"REORDER REVIEW - Monday\nReorder point = average daily use x lead time (days) + safety stock.\n\nItem A - shipping labels (roll)\nAverage daily use: 40 | Lead time: 6 days | Safety stock: 90 | On hand: 310\n\nItem B - packing tape (roll)\nAverage daily use: 25 | Lead time: 4 days | Safety stock: 50 | On hand: 200\n\nItem C - stretch film (roll)\nAverage daily use: 12 | Lead time: 7 days | Safety stock: 30 | On hand: 150\nUpdate from the supplier last Thursday: lead time for stretch film is now 10 days because of a shortage at their plant.\n\nThe buyer places orders; the ops manager signs anything over $5,000.","rules":[{"type":"plainText"},{"type":"maxWords","max":80}],"promptHints":[{"label":"Gives the formula","patterns":["daily use","lead time","safety stock"]},{"label":"Shows the math","patterns":["show the math","show (your )?work","x \\d+"]},{"label":"Uses latest lead time","patterns":["latest","updated","newest","most recent"]},{"label":"Defines ORDER or HOLD","patterns":["order","hold","at or below"]},{"label":"Asks for plain text","patterns":["plain","no bold","no markdown","no formatting","no headings"]}],"mistakes":[{"title":"Using the old lead time","why":"The AI uses 7 days for stretch film because it is listed first.","fix":"Say: \"Use the latest lead time given for each item.\"","checks":["r2"]},{"title":"Skipping the math","why":"The AI gives a verdict with no numbers, so errors hide.","fix":"Say: \"Show the math on every line, like 40 x 6 + 90 = 330.\"","checks":["r1"]},{"title":"Extra commentary","why":"The AI adds notes on suppliers and approvals.","fix":"Say: \"Exactly three lines, no other text.\"","checks":["r0"]},{"title":"Getting markdown back","why":"AI adds bold, headings and bullets by default, which show up as stray symbols where this is pasted.","fix":"Say \"plain text, no bold, no headings, no asterisks\".","checks":["plainText"]},{"title":"Trusting the AI to count words","why":"AI is bad at counting and usually runs long, so a vague \"keep it short\" lands over the limit.","fix":"Cap each part instead of the total, for example \"each line under 15 words\".","checks":["maxWords"]}],"hint":"Give the formula, show the math on each line and tell it to use the latest lead time.","mission":"Tell the buyer which of three items to order today.","musts":["Use latest lead time","Include safety stock","ORDER at or below point"],"rubricLabels":["There are three lines starting Item A:, Item B: and Item C: in that order, each ending with ORDER or HOLD","Item A shows 40 x 6 + 90 = 330 with on hand 310 and ORDER, and Item B shows 25 x 4 + 50 = 150 with on hand 200 and HOLD","Item C uses the new 10-day lead time and shows 12 x 10 + 30 = 150 with on hand 150 and ORDER (not the old 7 days)"]}