\input zb-basic \input zb-ioport \iteman{io-port 03960952} \itemau{Bandemer, Hans-Walter} \itemti{Einige Bemerkungen zur Modellierung der Ungenauigkeit und Unsicherheit bei der Untersuchung funktionaler Beziehungen.} \itemso{Wiss. Z. Tech. Hochsch. Carl Schorlemmer Leuna-Merseburg 28, 297-301 (1986).} \itemab Summary: Implementation of numerical and statistical methods within program systems often prevents the user from knowing, in which modelling context the method employed makes sense for his problem of evaluation of a functional relationship. The paper presents an order of such methods according to the following aspects: (i) what is known on the dependence before the experimental investigation starts, (ii) what is assumed to be the result of the investigation, (iii) what sort of model imagination is used. \itemrv{~} \itemcc{} \itemut{statistical methods; program systems; modelling} \itemli{} \end