- Input
Input is the term denoting either an entrance or changes which are inserted into a
system and which activate/modify aprocess . It is an abstract concept, used in the modeling, system(s) design and system(s) exploitation. It is usually connected with other terms, "e.g.", input field, input variable, input parameter, input value, input signal,input device and input file.Overview
From the most general
systemics perspective, input is a subjective concept and depends on how the system is used. In such sense, the same system can have different inputs in different applications.In the case of a process description/model, input is closely connected with the concept
output . Here, what enters is called input and what exits is called output.Example:For an abstract system "A(x,y,p)", where "x,y" are variables and "p" is a parameter, "x" may denote input (variable) and "y" may denote the output for a process: "y = f(p,x)", but, for another goal/(system application), the system "A" can be the
carrier of a process "x = g(p,y)", where "y" is an input and "x" is an output.Fact|date=February 2007Usually, in the modeling of a problem/process, input are these variables which are known and output are those unknown to us yet.
In recognition that the quality of the input can be crucial to the value of the output, a famous saying teaches us "Garbage IN, Garbage OUT" (GIGO).
See also
*
Output
*Input/output
*Gross Output
*Net output References
External links
* [http://www.thefreedictionary.com/input Definitions of input] by the freedictionary.
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