השוואת שיטות

	תרשים בקרה	תכנון ניסויים
תחום	תכנון ניסויים	תכנון ניסויים
משפחה	Process / pipeline	Process / pipeline
שנת המקור	1924 (first use); 1931 (seminal book)	1935
הוגה השיטה	Walter A. Shewhart (Bell Labs)	Ronald A. Fisher
סוג	Statistical monitoring and control technique	Experimental planning framework
מקור מכונן	Shewhart, W. A. (1931). Economic Control of Quality of Manufactured Product. Van Nostrand.	Fisher, R. A. (1935). The Design of Experiments. Oliver and Boyd.
כינויים	Shewhart chart, process-behavior chart, SPC chart, quality control chart	DOE, experimental design, factorial experimentation, planned experimentation
קשורות	6	3
תקציר	A control chart is a time-series graph with statistically derived upper and lower control limits that separates the natural, random variation of a process (common cause) from unusual, assignable variation (special cause). Invented by Walter Shewhart at Bell Labs in 1924, control charts remain the foundational tool of Statistical Process Control and are used across manufacturing, healthcare, software, and service industries to monitor whether a process remains stable and predictable over time.	Design of Experiments (DOE) is a systematic framework for planning, conducting, and analyzing controlled experiments to determine how multiple input factors simultaneously affect one or more responses. Introduced by Ronald A. Fisher in 1935, DOE allows researchers and engineers to identify causal relationships, quantify factor effects, and find optimal settings efficiently — using far fewer runs than one-factor-at-a-time approaches. It is foundational in engineering, manufacturing, agriculture, and applied sciences.