By means of the Calculate PuT skim matrix procedure or during an assignment the skim data can be calculated (PuT skim categories) for the PuT skims of the various skim categories (Using Visum: Calculating PuT skims).
Since there are numerous routes or connections for an OD pair usually, the skims gained per route or connection are aggregated to relation-based skim data by OD pair. Apart from the service frequency which results from the number of connections, all skims are provided on the level of connections as well as on the level of OD pairs.
