विधियों की तुलना करें

	सांख्यिकीय प्रक्रिया नियंत्रण	गुणवत्ता कार्य परिनियोजन
क्षेत्र	प्रयोगात्मक अभिकल्प	प्रयोगात्मक अभिकल्प
परिवार	Process / pipeline	Process / pipeline
उद्भव वर्ष	1924–1931	1966 (Japan); popularised in the West ~1988
प्रवर्तक	Walter A. Shewhart	Yoji Akao
प्रकार	Process monitoring and quality control method	Structured quality planning and product design method
मौलिक स्रोत	Shewhart, W. A. (1931). Economic Control of Quality of Manufactured Product. Van Nostrand. ISBN: 978-0873890762	Akao, Y. (Ed.). (1990). Quality Function Deployment: Integrating Customer Requirements into Product Design. Productivity Press. ISBN: 978-0915299416
उपनाम	SPC, statistical quality control, process control charting, Shewhart control	QFD, House of Quality, customer-driven engineering, voice of the customer matrix
संबंधित	6	4
सारांश	Statistical Process Control (SPC) is a data-driven quality method that uses statistical techniques — primarily control charts — to monitor a manufacturing or service process over time. By distinguishing natural process variation (common cause) from unusual, actionable variation (special cause), SPC enables practitioners to maintain processes in a stable, predictable state and to detect problems early, before defective output reaches customers.	Quality Function Deployment (QFD) is a structured method for translating customer needs — the voice of the customer — into specific technical requirements at every stage of product or service development. Originating in Japan in the 1960s, QFD uses a matrix-based tool called the House of Quality to make customer priorities visible, link them to engineering parameters, expose trade-offs, and maintain focus on what customers actually value throughout the design process.