Cyber-physical systems are often characterised by large scale, distributed and heterogeneous dynamics. Hierarchical control has been a popular and widely used approach to deal with such systems. It can be interpreted as an attempt to handle complex problems by decomposing them into smaller subproblems and reassembling their solutions into a ”functioning” hierarchical structure. It typically inv...

Computing tight performance bounds in feed-forward networks under general assumptions about arrival and server models has turned out to be a challenging problem. Recently it was even shown to be NP-hard [1]. We now address this problem in a heuristic fashion, building on a procedure for computing provably tight bounds under simple traffic and server models. We use a decomposition of a complex p...