Rate based on actual updates

Hi Team,

We want to know the options offered by OTM to receive shipment actuals from carriers/forwarders and rating based on that.

Most carriers/forwarders don't have OTM ship unit level information and when they send back the actuals its usually at a header level (i.e, number of pieces, weight, volume etc). The way we understand is, just updating OTM header weight will not help in rating shipments as there will be a mismatch between total weight and sum of ship unit weight and OTM rates at a shipment ship unit/ship unit line level. Has anyone else implemented rating based on actuals from carrier? If yes, we are interested to know your approach.