Sometimes clearances do not come back with results you like.  We would all like to have very dog be champion with OFA Hips Excellent, Elbows Normal, Eyes clear, PRA Normal, EIC clear, Heart ECHO Normal, CNM Normal with full dentition.  This is usually not the case.  We are sometimes put in situations where we have to use our tools wisely to make a breeding decision.  As in the case of hips, if you have a dog with OFA Fair hips and normal elbows would you consider breeding it? Hip dysplasia involves many genes and environmental influences in dogs.  From the OFFA website: 
"Do not ignore the dog with a fair hip evaluation. The dog is still within normal limits. For example; a dog with fair hips but with a strong hip background and over 75% of its brothers and sisters being normal is a good breeding prospect. A dog with excellent hips, but with a weak family background and less than 75% of its brothers and sisters being normal is a poor breeding prospect."

I would add to this to look at the pedigree of the dog and look at hip clearances for several generations and see what is produced.  I would not rule a dog with Fair hips from my breeding program if the family background was strong.We are fortunate to now have tests to look at genetic diseases cause by simple dominant/recessive traits.  If a dog is tested as a carrier, this means the dog if bred to a clear/normal it will produce carriers or normals but not affected.  By using the testing tools correctly a breeder can eliminate the genes from their breeding program in a few generations.Breeders need to learn not to eliminate or discriminate against dogs that may have undesirable test results.  We are fortunate to have many screening tools in our tool box but we need to learn to use them wisely.