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From Jing Song's thesis:
 C. D. Wijaya made the rules for ranking the kinetics.  Here, the 
author quotes the description of the ranking rules in her thesis to illustrate the meaning of 
kinetics rank: "The quality rank number ranges from 1 to 5, with the 1 being most reliable.  
Rank 1 is assigned to rate rules parameters that are in good agreement with several 
literature data.  Parameters obtained from direct measurements in experiments, or from 
high-level quantum chemistry calculations that are in good agreement with experimental 
results are ranked 2.  Results from direct measurements, but at very limited temperature 
and pressure range are ranked 3.  When using results from experiments, efforts were 
made to take only the rates at or near the high-pressure limits.  Rate rules from high level 
quantum chemistry calculations, but without comparison with experimental results are 
also ranked 3.  Rank 4 is for data from indirect measurements, or extensive literature 
review.  Finally, rank 5 is for rate parameters estimated using a big mechanism to fit 
experimental data, usually in a limited temperature and pressure range.  A default value is 
assigned to the top level of the rate rules tree of each reaction family.  This is a very 
rough estimation of what the order of magnitude of the reaction should be, and is ranked 
10.”