Thanks for your responses but it seems I should clarify some points on my original post. The scenario goes like this.
We operate 99% of the time to uncontrolled airports most of which have only Non-precision approaches available. We frequently have the benefit of having enough fuel to carry out say, up to 5 approaches before proceeding to an alternate. The situation would be where you only have the benefit of a Metar(at best!) and the WX is fluctuating about the landing minimums. (ie: cloud base and Vis).
This case is not only specific to this as I have travelled with many carriers who if fuel permits will attempt more than one approach in adverse WX.(fuel permitting)
So, do other operators have policies where there is a MAXIMUM number of attempts before you have to proceed to an alternate.
The sort of factors that I've heard that are considerations would be Pax comfort, anxiety etc etc. Remember, I'm talking about the case where you have the benefit of having sufficient fuel to carry out approaches before you divert.
Not all operators are restricted to 'one approach then the alternate.