Table 3 Constraints between punches for example 1.

From: Automatic strip layout design in progressive dies using the grouping genetic algorithm

Constraint

Punches with this constraint

Intersection

{P6,P8}, {P7,P8}, {P9,P11}, {P10,P11}, {P20,P18}, {P20, P19}

Priority

{P3,P4,P5}, {P18,P14,P15}, {P19,P16,P17}

Assignment in the First station

P1, P2

Assignment in the Last station

P20