changes in average value are plotted and uses the expert system as an interpretation aid proceeding with the dialog specified below in each step of the dialog the content of the windows of the dialog screen is specified the term of the menu underlined in each case in the indication of the menu window denotes the input by the laboratory assistant if uster expert provides you with assistance in interpretation of reports from uster tester 3 if with the uster tester you can test fluctuations in mass hairiness or twist expert helps you in creating the diagnosis for a specific yarn defect this step can also take place automatically by the system automatically detecting the abrupt change in average value so that no question has to be posed to the user if indication of a curve with abrupt changes in average value and of a line which indicates the package lengths df at what intervals do the abrupt changes in average value take place mf as in the graphic for the package lengths at shorter intervals for better representation of the statement or diagnoses extensive text files and or graphics are available which are not tied to the format of the 34 info 34 window the actual sequence of a dialog together with the associated displays is fixed on the one hand by the rules entered beforehand with the knowledge editor km fig1 and on the.