Fishbone Diagrams are causal diagrams that show the potential causes of a specific event. Common uses are product design and quality defect prevention to identify potential factors causing an overall effect.
Deductive reasoning is the process of inferring a conclusion logically from a premise or theory. Alternatively, Inductive reasoning is a method of deriving a general principle or theory from a body of observations.
ladder of inference
The Ladder of Inference describes the thinking process that we go through, usually without realizing it, to get from a fact to a decision or action.
The pyramid principle is a method of structuring communications for maximum impact. The idea is to start with the main idea, and then use logically grouped arguments to support the position.