Disclosed is a chromatography system arranged to perform automated chromatography column efficiency testing for a specific column to determine efficiency parameters such as h and As and optionally to further provide guidance to the user with respect to column efficiency, the system having a controller arranged to automatically access data to enable the calculation of a column compression plate height, said data being derived from at least stored parameters of the specific column and the resin to be used in that column, thereby to calculate the efficiency of the column.