GATE Operations Research and Operations Management: Production Control – Previous Year Questions
18 GATE previous year questions on Production Control (Operations Research and Operations Management, Production and Industrial Engineering) with answers and explanations, from every paper.
- GATE 2021 PI Q15 – Which is NOT a measure of forecast error?
- GATE 2021 PI Q40 – In classical EOQ, Q is optimal order quantity and C is minimum annual ordering-plus-holding cost. If quantity is incorrectly set to Q′ = 2Q, find…
- GATE 2021 PI Q49 – Four jobs A,B,C,D are available on day 1 for a single CNC machine. Processing times (days) are 8,5,7,9 and due days 14,10,12,19 respectively. Using…
- GATE 2022 PI Q59 – A company procures 384 parts annually. Annual holding cost is ₹30/part; ordering cost is ₹1000/order. Find EOQ (integer).
- GATE 2022 PI Q61 – A component passes sequentially through five workstations with cycle times 85,55,90,65,70 seconds. Find steady-state mass-production output per hour…
- GATE 2022 PI Q65 – Weekly oxygen-cylinder demand is forecast using exponential smoothing, α = 0.2. Actual demands in weeks 1–4 are 375,412,592,439; forecast for week 3…
- GATE 2023 PI Q20 – Which forecasting method is qualitative?
- GATE 2023 PI Q40 – Six jobs require drilling followed by reaming. Processing times (drilling, reaming), in minutes, are 1:(30,45), 2:(30,15), 3:(60,40), 4:(20,25),…
- GATE 2023 PI Q51 – Product P has annual demand 2500 units, ordering cost ₹60/order and annual holding cost ₹30/unit. Q has demand 3600, ordering cost ₹80 and holding…
- GATE 2024 PI Q25 – Which forecasting method needs the least historical data?
- GATE 2024 PI Q30 – Which ONE OR MORE are supply-chain decision areas?
- GATE 2024 PI Q64 – An item uses classical EOQ. Ordering cost per order rises 20% and demand rate also rises 20%. By what percentage does time between orders increase…
- GATE 2024 PI Q65 – Jobs A,B,C,D,E are ready at t = 0 and take 9,6,4,5,8 days respectively on one machine. Under SPT, find average flow time (one decimal days).
- GATE 2025 PI Q33 – Annual demand is 2000 bulbs, ordering cost ₹300/order and annual holding cost ₹30/bulb. Find EOQ (integer bulbs).
- GATE 2025 PI Q60 – Annual demand is 5000 units, ordering cost ₹400/order and annual holding rate 30% of unit price. All-units prices are ₹10 for Q < 1200, ₹8 for 1200 ≤…
- GATE 2026 PI Q23 – Which is NOT an assumption of the economic order quantity (EOQ) model?
- GATE 2026 PI Q35 – A toy-car plant has monthly demands: September 8000; October 6500; November 10500; December 9500 units. It can use ONLY in-house production,…
- GATE 2026 PI Q59 – A central server processes one program at a time. Four programs are ready at 10:00 am. Programs 1,2,3,4 take 60,40,90,100 minutes, with same-day due…