. ▁ ▁The ▁left ▁side ▁of ▁figure ▁ 2 . 3 . 1 ▁is ▁the ▁meta - process ▁model ▁of ▁the ▁Im plementation ▁phase . ▁The ▁four ▁labels ▁with ▁a ▁black ▁shadow ▁mean ▁that ▁these ▁activities ▁are ▁closed ▁concepts ▁and ▁they ▁are ▁not ▁expanded ▁in ▁this ▁context . ▁No ▁ar rows ▁connect ▁these ▁four ▁activities , ▁meaning ▁that ▁these ▁activities ▁are ▁un ordered ▁and ▁the ▁reporting ▁will ▁be ▁carried ▁out ▁after ▁the ▁completion ▁of ▁all ▁four ▁activities . ▁ ▁During ▁the ▁implementation ▁phase ▁concepts ▁are ▁created ▁and ▁/ or ▁adjust ed . ▁ ▁The ▁concepts ▁created ▁and / or ▁adjust ed ▁are ▁mode led ▁using ▁the ▁meta - model ing ▁technique . ▁The ▁right ▁side ▁of ▁figure ▁ 2 . 3 . 1 ▁is ▁the ▁meta - data ▁model ▁of ▁the ▁implementation ▁sub - process . ▁ ▁Im plementation ▁documents ▁are ▁an ▁open ▁concept ▁and ▁is ▁expanded ▁upon ▁in ▁this ▁context . ▁It ▁consists ▁of ▁four ▁closed ▁concepts ▁that ▁are ▁not ▁expanded ▁because ▁they ▁are ▁irrelevant ▁in ▁this ▁particular ▁context . ▁ ▁In ▁order ▁to ▁make ▁the ▁relations ▁between ▁the ▁two ▁models ▁clearer ▁the ▁integration ▁of ▁the ▁two ▁models ▁is ▁illustrated ▁in ▁Figure ▁ 2 . 3 . 1 . ▁The ▁d otted ▁ar rows ▁running ▁from ▁the ▁activities ▁to ▁the ▁concepts ▁illustrate ▁which ▁concepts ▁are ▁created / ▁adjust ed ▁in ▁the ▁corresponding ▁activities . ▁ ▁Figure ▁ 2 . 3 . 1 : ▁Process - data ▁model ▁Im plementation ▁sub - process ▁ ▁E valu ation ▁ ▁E valu ation ▁is ▁necessary