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If the change affects how fields are encoded, it is recommended to test the new encoding by ingesting test data in the MARS archive.
Also before sending the test data please use the basic quality tool grib_check.py (checking allowed min/max for each parameter) as per the information in Recommended support checks (mentioned in Support overview). Also other checking tools described in those pages shouls be a standard part of your workflow to minimize the support needed in the production phase.
Update the documentation
Models are documented in two places:
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