Σύγκριση μεθόδων

	Στατιστικός Έλεγχος Διεργασιών	Ανάπτυξη Λειτουργίας Ποιότητας
Πεδίο	Πειραματικός Σχεδιασμός	Πειραματικός Σχεδιασμός
Οικογένεια	Process / pipeline	Process / pipeline
Έτος προέλευσης	1924–1931	1966 (Japan); popularised in the West ~1988
Δημιουργός	Walter A. Shewhart	Yoji Akao
Τύπος	Process monitoring and quality control method	Structured quality planning and product design method
Θεμελιώδης πηγή	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
Εναλλακτικές ονομασίες	SPC, statistical quality control, process control charting, Shewhart control	QFD, House of Quality, customer-driven engineering, voice of the customer matrix
Συναφείς	6	4
Σύνοψη	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.