Meta model dialog: # of models, atoms, & objects, attributes, connections (size of metamodel) 1, 7, 1 aspect, 14, 0 8, 14, 0 # of variations time taken (total cnbs, qualitative, structural) 2, 2, 0 6 secs. 2, 0, 2 6 secs. 4, 2, 2 10 secs. 7, 3, 4 15 secs. 9, 3, 6 17 secs. 11, 5, 6 20 secs. 13,6, 7 21 secs. 15,6, 9 27 secs. 15,0, 15 25 secs. Meta model reqmt.: # of models, atoms, & objects, attributes, connections (size of metamodel) 2, 1, 1 aspect, 2, 2 3, 2, 2 Meta model reqmt.: # of models, atoms, & objects, attributes, connections (size of metamodel) 2, 6, 1 aspect, 14, 4 8, 14, 4 # of variations time taken (total cnbs, qualitative, structural) 11, 8, 3 26 secs. 9, 6, 3 25 secs. 7, 5, 2 23 secs. 5, 5, 0 20 secs. 4, 4, 0 18 secs. 2, 2, 0 11 secs. HOT-2 size of variability metamodel (enterprise) 16, 34 15 24 13 21 11 17 9 13 7 11 4 7 2 5 qos configuration 11 24 9 19 7 15 5 11 4 9 2 6 case study (1) (2) (3) dialog - 16 64 8 qos - 16 104 12