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  2. Ishikawa diagram - Wikipedia

    en.wikipedia.org/wiki/Ishikawa_diagram

    The causes emerge by analysis, often through brainstorming sessions, and are grouped into categories on the main branches off the fishbone. To help structure the approach, the categories are often selected from one of the common models shown below, but may emerge as something unique to the application in a specific case.

  3. Root cause analysis - Wikipedia

    en.wikipedia.org/wiki/Root_cause_analysis

    In science and engineering, root cause analysis (RCA) is a method of problem solving used for identifying the root causes of faults or problems. [1] It is widely used in IT operations, manufacturing, telecommunications, industrial process control, accident analysis (e.g., in aviation, [2] rail transport, or nuclear plants), medical diagnosis, the healthcare industry (e.g., for epidemiology ...

  4. Current reality tree (theory of constraints) - Wikipedia

    en.wikipedia.org/wiki/Current_reality_tree...

    One of the thinking processes in the theory of constraints, a current reality tree (CRT) is a tool to analyze many systems or organizational problems at once. By identifying root causes common to most or all of the problems, a CRT can greatly aid focused improvement of the system.

  5. Change impact analysis - Wikipedia

    en.wikipedia.org/wiki/Change_impact_analysis

    Change impact analysis is defined by Bohnner and Arnold [4] as "identifying the potential consequences of a change, or estimating what needs to be modified to accomplish a change", and they focus on IA in terms of scoping changes within the details of a design.

  6. Causal inference - Wikipedia

    en.wikipedia.org/wiki/Causal_inference

    Causal inference is the process of determining the independent, actual effect of a particular phenomenon that is a component of a larger system. The main difference between causal inference and inference of association is that causal inference analyzes the response of an effect variable when a cause of the effect variable is changed.

  7. Four causes - Wikipedia

    en.wikipedia.org/wiki/Four_causes

    The formal cause of a change or movement. This is a change or movement caused by the arrangement, shape, or appearance of the thing changing or moving. Aristotle says, for example, that the ratio 2:1, and number in general, is the formal cause of the octave. Efficient, or agent The efficient or moving cause of a change or movement.

  8. Common cause and special cause (statistics) - Wikipedia

    en.wikipedia.org/wiki/Common_cause_and_special...

    Evidence of some inherent change in the system or our knowledge of it. Special-cause variation always arrives as a surprise. It is the signal within a system. Walter A. Shewhart originally used the term assignable cause. [3] The term special-cause was coined by W. Edwards Deming. The Western Electric Company used the term unnatural pattern. [2]

  9. Causality - Wikipedia

    en.wikipedia.org/wiki/Causality

    Causality is an influence by which one event, process, state, or object (a cause) contributes to the production of another event, process, state, or object (an effect) where the cause is at least partly responsible for the effect, and the effect is at least partly dependent on the cause. [1]