No answer
As this subject is all tied up in the company operations manual there is unlikely to be a definitive answer as what is good in one company may be prohibited in another.
Most operators prohibit landing with "poor" braking action reported but I am sure that someone on this forum will come up with an example where it is allowed.
An example of the diffence in company stance is that a company I know is allowed to use the BA in the first two thirds of a runway if they can stop in the first two thirds and disregard the BA in the last third. Another company I know of mandates the use of only the lowest BA for the runway.
Last edited by A and C; 1st Mar 2013 at 13:38.