History plays a huge role in setting guarantees.
And don't limit your analysis to just one year of records. Look back at several years. We planned a meeting in San Diego last year, for example, and it turned out that the 1996 information was more accurate than the 1997 information. When you have a handle on the statistical history of the meeting, take a look at how current conditions could affect attendance at meal functions. If the property is in an isolated location, attendance at meal functions is likely to be high because delegates don't have anywhere else to go.