Basic Flowchart Symbols and Meaning

"Decision-making can be regarded as the cognitive process resulting in the selection of a belief and/ or a course of action among several alternative possibilities. Every decision-making process produces a final choice that may or may not prompt action. ...
Decision-making can also be regarded as a problem-solving activity terminated by a solution deemed to be satisfactory. It is, therefore, a reasoning or emotional process which can be rational or irrational and can be based on explicit assumptions or tacit assumptions. Most decisions are followed by some form of cost-benefit analysis. Rational choice theory encompasses the notion that people try to maximize benefits while minimizing costs.
Some have argued that most decisions are made unconsciously, if not involuntarily. Jim Nightingale, author of Think Smart – Act Smart, states that "we simply decide without thinking much about the decision process. ...
A major part of decision-making involves the analysis of a finite set of alternatives described in terms of evaluative criteria. Information overload occurs when there is a substantial gap between the capacity of information and the ways in which people may or can adapt."" [Decision-making. Wikipedia]
The block diagram example "Customer decision making" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Block Diagrams solution from the area "What is a Diagram" of ConceptDraw Solution Park.