Little is known about routine interconnectedness and its temporal dimension, and yet, in fast changing environments, the dynamics of routine interaction may matter. In order to investigate this issue, this paper focuses upon routine transformation and their impact upon meta-routine outcome. This paper draws upon 3 longitudinal cases in a complex dynamic setting – post acquisition integration to explore routine combinations. Conceptualizing post acquisition integration as amalgamation of routines of two participating firms, we find that temporal nature of routines inhibit routines combinations and new routines in the form of connectors are required to restore the interconnectedness of the combined routine networks. This empirical study, in addition to advancing routines theory, opens up the black box of post acquisition integration by providing details of what actually happens during integrations.