A method of adjusting the slice limit of a counting by weight counting system, the method comprising the steps of: providing said system with one or more properties of an item to be counted; adding one or more of said items to said counting by weight counting system; measuring the weight of the total number of said items added to said counting by weight counting system; determining the total number of said items added to said counting by weight counting system, said determination being based on at least one predetermined weight of one of said items; determining the average weight of said items added to said counting by weight counting system; determining the mean value of said at least one predetermined weight of one of said items and said average weight of said items added to said counting by weight counting system; determining the standard deviation of said at least one predetermined weight of one of said items and said average weight of said items added to said counting by weight counting system; and determining a new slice limit of the counting by weight counting system, said determination being based on the mean value of said at least one predetermined weight of one of said items and said average weight of said items added to said counting by weight counting system, the standard deviation of said at least one predetermined weight of one of said items and said average weight of said items added to said counting by weight counting system, and a sensitivity factor, the sensitivity factor being based upon the relationship between the determined standard deviation of said at least one predetermined weight of one of said items and said average weight of said items added to said counting by weight counting system and simulated standard deviations of predetermined weights and average weights of items added to simulated counting by weight counting systems. providing said system with one or more properties of an item to be counted; adding one or more of said items to said counting by weight counting system; measuring the weight of the total number of said items added to said counting by weight counting system; determining the total number of said items added to said counting by weight counting system, said determination being based on at least one predetermined weight of one of said items; determining the average weight of said items added to said counting by weight counting system; determining the mean value of said at least one predetermined weight of one of said items and said average weight of said items added to said counting by weight counting system; determining the standard deviation of said at least one predetermined weight of one of said items and said average weight of said items added to said counting by weight counting system; and determining a new slice limit of the counting by weight counting system, said determination being based on the mean value of said at least one predetermined weight of one of said items and said average weight of said items added to said counting by weight counting system, the standard deviation of said at least one predetermined weight of one of said items and said average weight of said items added to said counting by weight counting system, and a sensitivity factor, the sensitivity factor being based upon the relationship between the determined standard deviation of said at least one predetermined weight of one of said items and said average weight of said items added to said counting by weight counting system and simulated standard deviations of predetermined weights and average weights of items added to simulated counting by weight counting systems.