Parameters are not things that you work

*within*. The word is a mathematical term for what is sometimes called, enigmatically, a variable constant. To take a simple example, the equation*y*=*mx*is the general form of the equation for a straight line passing through the origin. The*x*and*y*are the independent and dependent variables, respectively. But*m*represents the slope of the line. For any given line, it is a constant. But*m*can take any value, so it is also a variable. So the value it takes determines which straight line through the origin is being considered. This*m*is a therefore a parameter.
If you want to transfer this idea to a business or social context, then you could say that the parameters are the variables whose values determine precisely the nature of the situation you are in. It would be perfectly acceptable, for example, to say that 'two of the the parameters for an architectural project are budget and completion time'. But not to say that 'the parameters of the site are clearly marked on this map'. That's talking about perimeter!

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