WBS, Outline Number, Different Grouping

[pistocar]

I have some problems about grouping. I work for industry product base on
project.
I have to do some different grouping in the folder. I anaylize each
sub-group base on demand, production, buying and transporting etc; But at the
same time these most sub-groups contained by main groups of demand,
production, buying and transporting. Finally I must group the sub-groups
twice or more times.If I could change or edit outline number I'll solve it.
Also maybe some tracking macros help me. If you have any idea or alternative
solution about it help me please..

 

[pistocar]

For Example;

1_Machine
1_1_demand
1_2_production
1_3_transporting
1_4_piston
1_4_1_demand
1_4_2_production
1_4_3_transporting
1_5_transmission
1_5_1_demand
1_5_2_production
1_5_3_transporting

grouping like these above

My problem ; 1_5_1 must contained by 1_5_transmission and 1_1_demand


If you have any idea or alternative solution about it help me please..