{"id":"ops-weekly-labor-cost-per-unit-with-overtime","audience":"managers","category":"operations-work","track":"operations","technique":"verification","level":"intermediate","title":"Compute labor cost per unit with overtime and compare to last week","free":false,"task":"Write a prompt for plain text with exactly five lines: \"Regular:\", \"Overtime:\", \"Total:\", \"Per unit:\" and \"Change:\". Show hours x rate on the first two lines, the sum on Total, and total divided by units shipped on Per unit (three decimals not needed; use cents). Change compares with last week as dollars and a percent with one decimal. Under 90 words.","materialLabel":"Your material (attached to your prompt automatically)","material":"WEEKLY LABOR COST - Shipping, week 12\n\nRegular hours: 1,600 at $22.00 per hour.\nOvertime hours: 120 at $33.00 per hour (time and a half).\nUnits shipped: 78,320.\nLast week's labor cost per unit: $0.46.\nLast week's units shipped: 74,500, with 1,500 regular hours and 90 overtime hours (for reference only; it is already summarized in the $0.46).\nRates have not changed since last week. The plant manager reviews this report every Monday and decides about staffing; this exercise only reports the numbers.\n\nThe supervisor said, \"Overtime is small, just use regular hours.\" Overtime is real cost and counts. Labor cost here means wages for hours worked only; benefits and payroll taxes are tracked elsewhere.","rules":[{"type":"plainText"},{"type":"maxWords","max":90}],"promptHints":[{"label":"Quotes the five labels","patterns":["regular:","overtime:","total:","per unit:","change:"]},{"label":"Asks for hours x rate","patterns":["hours x","show","x 22"]},{"label":"Includes overtime","patterns":["overtime counts","include overtime"]},{"label":"Defines the change","patterns":["last week","percent","one decimal"]},{"label":"Asks for plain text","patterns":["plain","no bold","no markdown","no formatting","no headings"]}],"mistakes":[{"title":"Dropping overtime","why":"The AI follows the supervisor and uses regular hours only.","fix":"Say: \"Overtime counts; include it in Total.\"","checks":["r1"]},{"title":"Percent against the wrong base","why":"The AI divides the change by this week's cost.","fix":"Say: \"Percent of last week's $0.46, one decimal.\"","checks":["r2"]},{"title":"Wrong lines","why":"The AI writes a narrative.","fix":"Quote the five labels in order.","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 formulas line by line and include overtime in the total.","mission":"Work out labor cost per unit and compare with last week.","musts":["Hours times rate","Per unit in cents","Change in dollars and percent"],"rubricLabels":["There are five lines starting Regular:, Overtime:, Total:, Per unit: and Change: in that order","Regular shows 1,600 x 22 = 35,200, Overtime shows 120 x 33 = 3,960, and Total shows 35,200 + 3,960 = 39,160","Per unit shows 39,160 / 78,320 = $0.50, and Change shows +$0.04 or +8.7% versus $0.46"]}