Improvement for two faults of AHP

AHP has been applied to many fields.In the process of application,two faults have been found.First,there is large objective error through direct judging the magnitude of rule layer power between factors;second,the value exporter given is a determine value and it doesn′t match with the fact.Based on this,the article indirectly calculated the magnitude of rule layer power,then adopted three time evaluation approach to determine judgment value and analyzed the error that the error of judgment value caused to the magnitude of rule layer power and the final value.