-1=if (metier.getGearParameterValueAsDouble()<=50) return (1/(1+(Math.exp(-2.04*(group.getLength()-11.82)))));else if (metier.getGearParameterValueAsDouble()<=60) return (1/(1+(Math.exp(-2.45*(group.getLength()-17.74)))));else if (metier.getGearParameterValueAsDouble()<=70) return (1/(1+(Math.exp(-2.86*(group.getLength()-16.56)))));else if (metier.getGearParameterValueAsDouble()<=80) return (1/(1+(Math.exp(-3.27*(group.getLength()-18.92)))));else return  1;
1=if (metier.getGearParameterValueAsDouble()<=50) return (1/(1+(Math.exp(-2.04*(group.getLength()-17.74)))));else if (metier.getGearParameterValueAsDouble()<=60) return (1/(1+(Math.exp(-2.45*(group.getLength()-21.288)))));else if (metier.getGearParameterValueAsDouble()<=70) return (1/(1+(Math.exp(-2.86*(group.getLength()-24.84)))));else if (metier.getGearParameterValueAsDouble()<=80) return (1/(1+(Math.exp(-3.27*(group.getLength()-28.38)))));else return  1;