Hi Marion
Just out of curiousity, how do you rank vendors - based on invoices (purchases) or on payments? The payment statistics are more likely to be accurate than the purchase statistics, because there are always going to be straggler invoices from the prior year that come in after you've already updated the statistics by running year-end processing.
If it is important that both payments and purchases be accurate, the utility Toolkit for Adagio and re-calculate the statistical fields after-the-fact.
Steve