HonorGod wrote: 
Can somebody help with my issue?
You can use ACTIVATION-GROUP attribute in your rules and put all of your rules in the same DT, for example (this does not include your third rule but you get the point ...)
Look at the ACTION column of the first rule which is in the default activation group, it has drools.setFocus("XYZ"); which will activate the second. Hope this helps:



 RuleTable FirstCalculation





CONDITION CONDITION CONDITION CONDITION ACTION

f1:Fact1 f2:Fact2 f3:Fact3 f4:Fact4


part == $param part == $param part == $param part == $param f4.setPart($param);update(f4);drools.setFocus("secondaryRules");
FirstCalculation rules Part Value Part Value Part Value Part Value Set part
Part Value 1 2 3 0 4






















RuleTable SecondCalculation





CONDITION CONDITION CONDITION CONDITION ACTIVATION-GROUP ACTION

f1:Fact1 f2:Fact2 f4:Fact4 f5:Fact5


part == $param part == $param part == $param part == $param
f5.setPart($param);update(f5);System.out.println("You get the point...");
SecondCalculation rules Part Value Part Value Part Value Part Value
Set part
Part Value 1 2 4 0 secondaryRules 4