FUNCTION_BLOCK SingletonQoSFewRules

VAR_INPUT
	commitment : REAL;
	clarity : REAL;
	influence : REAL;
END_VAR

VAR_OUTPUT
	service_quality : REAL;
END_VAR

FUZZIFY commitment
	TERM nothing := GAUSS 0 1;
	TERM minimal := GAUSS 1 1;
	TERM partially := GAUSS 2 1;
	TERM satISfactory := GAUSS 3 1;
	TERM largely := GAUSS 4 1;
	TERM fully := GAUSS 5 1;
END_FUZZIFY

FUZZIFY clarity
	TERM low := GAUSS 0 1;
	TERM medium := GAUSS 2.5 1;
	TERM high:= GAUSS 5 1;
END_FUZZIFY

FUZZIFY influence
	TERM low := GAUSS 0 1;
	TERM medium := GAUSS 2.5 1;
	TERM high:= GAUSS 5 1;
END_FUZZIFY

DEFUZZIFY service_quality
	TERM inadequate := 0;
	TERM sufficient := 2.5;
	TERM excellent := 5;
	METHOD : COGS;
	DEFAULT := 0;
END_DEFUZZIFY

RULEBLOCK No1
	AND : MIN;
	ACCU : MAX;
	
	RULE 1 : IF commitment IS fully AND influence IS high THEN service_quality IS excellent;
	RULE 2 : IF commitment IS partially AND clarity IS high AND influence IS low THEN service_quality IS sufficient;
	RULE 3 : IF commitment IS nothing THEN service_quality IS inadequate;
END_RULEBLOCK

END_FUNCTION_BLOCK