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World Dynamics

This is a graph from Forrester’s book World Dynamics. It originally appeared as an example in the Messinger, Rowe et al paper on the GRAB system. We added “same rank” constraints to force a certain level assignment, to evaluate edge crossing avoidance heuristics.

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digraph world {
size="7,7";
	{rank=same; S8 S24 S1 S35 S30;}
	{rank=same; T8 T24 T1 T35 T30;}
	{rank=same; 43 37 36 10 2;}
	{rank=same; 25 9 38 40 13 17 12 18;}
	{rank=same; 26 42 11 3 33 19 39 14 16;}
	{rank=same; 4 31 34 21 41 28 20;}
	{rank=same; 27 5 22 32 29 15;}
	{rank=same; 6 23;}
	{rank=same; 7;}

	S8 -> 9;
	S24 -> 25;
	S24 -> 27;
	S1 -> 2;
	S1 -> 10;
	S35 -> 43;
	S35 -> 36;
	S30 -> 31;
	S30 -> 33;
	9 -> 42;
	9 -> T1;
	25 -> T1;
	25 -> 26;
	27 -> T24;
	2 -> {3 ; 16 ; 17 ; T1 ; 18}
	10 -> { 11 ; 14 ; T1 ; 13; 12;}
	31 -> T1;
	31 -> 32;
	33 -> T30;
	33 -> 34;
	42 -> 4;
	26 -> 4;
	3 -> 4;
	16 -> 15;
	17 -> 19;
	18 -> 29;
	11 -> 4;
	14 -> 15;
	37 -> {39 ; 41 ; 38 ; 40;}
	13 -> 19;
	12 -> 29;
	43 -> 38;
	43 -> 40;
	36 -> 19;
	32 -> 23;
	34 -> 29;
	39 -> 15;
	41 -> 29;
	38 -> 4;
	40 -> 19;
	4 -> 5;
	19 -> {21 ; 20 ; 28;}
	5 -> {6 ; T35 ; 23;}
	21 -> 22;
	20 -> 15;
	28 -> 29;
	6 -> 7;
	15 -> T1;
	22 -> T35;
	22 -> 23;
	29 -> T30;
	7 -> T8;
	23 -> T24;
	23 -> T1;
}

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