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Five whys (or 5 whys) is an iterative interrogative technique used to explore the cause-and-effect relationships underlying a particular problem. [1] The primary goal of the technique is to determine the root cause of a defect or problem by repeating the question "why?" five times, each time directing the current "why" to the answer of the ...
Ishikawa diagrams (also called fishbone diagrams, [1] herringbone diagrams, cause-and-effect diagrams) are causal diagrams created by Kaoru Ishikawa that show the potential causes of a specific event. [2] Common uses of the Ishikawa diagram are product design and quality defect prevention to identify potential factors causing an overall effect ...
A root cause is the identification and investigation of the source of the problem where the person(s), system, process, or external factor is identified as the cause of the nonconformity. The root cause analysis can be done via 5 Whys or other methods, e.g. an Ishikawa diagram.
Eight Disciplines Methodology (8D) is a method or model developed at Ford Motor Company used to approach and to resolve problems, typically employed by quality engineers or other professionals. Focused on product and process improvement, its purpose is to identify, correct, and eliminate recurring problems. [ 1 ]
[24] [25] There are normally a series of causes stemming from one root cause, [26] and they can be visualized using fishbone diagrams or tables. The five whys can be used as a foundational tool in personal improvement. [27] Masaaki Imai made the term famous in his book Kaizen: The Key to Japan's Competitive Success. [1]
Although it may seem simplistic, the 5 Whys can be an invaluable tool for uncovering hidden problems and generating new ideas. Pugh matrix; Morphological analysis; 6 thinking hats; The method of loci: The method of loci is a strategy for memorizing new information. It is a mnemonic device that involves the visualization of placing pieces of ...
Process decision program chart. A useful way of planning is to break down tasks into a hierarchy, using a tree diagram. The process decision program chart (PDPC) extends the tree diagram a couple of levels to identify risks and countermeasures for the bottom level tasks. Different shaped boxes are used to highlight risks and identify possible ...
The seven basic tools stand in contrast to more advanced statistical methods such as survey sampling, acceptance sampling, statistical hypothesis testing, design of experiments, multivariate analysis, and various methods developed in the field of operations research. [10]