Thanks Fullblast
I searched for the reference you provided through google, it does'nt really mention anything specific about the factors:
JAR-OPS 1.400 Approach and landing conditions (See IEM OPS 1.400)
Before commencing an approach to land, the commander must satisfy himself that, according to the information available to him, the weather at the aerodrome and the condition of the runway intended to be used should not prevent a safe approach, landing or missed approach, having regard to the performance information contained in the Operations Manual.
IEM OPS 1.400 Approach and Landing Conditions (See JAR-OPS 1.400)
The in-flight determination of the landing distance should be based on the latest available report, preferably not more than 30 minutes before the expected landing time.
Do you have some other reference?
regards