AWB,i.e. FWB, is a legal contract between airlines and its shipping agent.

Dim & wgt task, mostly performed by warehouse after fact, is evidential but may not be consequential.

When weight discrepancy exceeds the threshold, instead of overwriting the weight on the AWB, the best practice is that ground handler alerts the local sales people. One common device they use is CCA. It is basically an amendment that the local sales make the forwarder agree to and sign for. After CCA is obtained, airlines may require the shipper to reissue an AWB. This is an exception handling process mainly for the purpose of freightage, i.e. the revenue and accounting, not really operational matter.

Data should be captured (FWB process) by following the AWB tendered with cargo. So is RCS.

The discrepancy on piece count is more material than the weight, is a show stop, and therefore no RCS will be triggered.