Function Relationships
The following functions are related, but have subtle differences:
The following matrix shows their relationships. In the matrix, opposite functions go from left to right, whereas cause and effect functions go up and down.
●
●Consider the following statement:
if x is true then Function will set y=5
In this statement,
x
influencesFunction
andFunction
affectsy
. This is shown in the matrix as follows:
● Elements above the double line influenceFunction
.
●For example,
x
is used byFunction
to determine whether to set the value ofy
, andFunction
is affectingy
by setting its value.There are four possible relationships between these functions: two opposites and two cause and effects.
To illustrate the relationships, consider the following static reaction in a state called
STATE
:[D]/X=5 if D is true, then set x=y
The following table shows the relationships.
Cause and effect: influenced by and affected bySTATE
readsy
to determine which value should be assigned toX
, and while inSTATE
,X
can be set toy
. Cause and effect: used by and affecting