เปรียบเทียบวิธี

	การวางแผนรวม (Aggregate Planning)	SMED
สาขาวิชา	การจัดการการดำเนินงาน	การจัดการการดำเนินงาน
ตระกูล	Machine learning	Machine learning
ปีกำเนิด	1992	1985
ผู้ริเริ่ม	Wallace, T. F.	Shigeo Shingo
ประเภท	Demand-supply planning framework	Setup time reduction technique
แหล่งต้นตำรับ	Wallace, T. F. (1992). Sales & Operations Planning: The how-to handbook. Cincinnati: APICS Publications.	Shingo, S. (1985). A revolution in manufacturing: The SMED system. Cambridge, MA: Productivity Press.
ชื่อเรียกอื่น	sales and operations planning, production planning	quick changeover, rapid setup
ที่เกี่ยวข้อง	5	5
สรุป	Aggregate Planning (or Sales & Operations Planning, S&OP) is a collaborative, iterative process that balances demand and supply at a high level—typically grouping products into families and planning over a 3–18 month horizon. Developed formally by Tom Wallace and popularized through APICS, aggregate planning helps organizations align sales forecasts, production capacity, inventory, and workforce to meet demand efficiently while managing costs. It serves as the bridge between strategic business plans and detailed operational execution.	Single Minute Exchange of Die (SMED) is a systematic approach developed by Shigeo Shingo in the 1980s to drastically reduce the time required to changeover equipment from producing one product to another. The methodology, part of the Toyota Production System, aims to reduce setup time to a single-digit minute range (ideally under nine minutes), enabling smaller batch sizes, faster response to customer demand, and improved flexibility in manufacturing. SMED is a cornerstone of lean manufacturing and just-in-time production.