A method for qualitatively and/or quantitatively classifying injection-moulding tools in tool categories and determining preferred intervention ranges and/or manipulated variables for adapting injection-moulding machine parameters in the case of changing ambient conditions and/or determining the influence of disturbing effects on the injection-moulding process, comprising the steps: a) providing an injection-moulding machine having the injection-moulding tool which is to be classified and which is intended for the determination, b) performing at least one injection-moulding cycle with injection-moulding machine settings in order to obtain a qualitatively adequate injection-moulding part, c) determining a quotient Q = Δp/Δs or Q = Δs n /Δs e characterizing a respective tool from c.1) a pressure rise Δp during the compression phase of the injection-moulding cycle and the melt volume □V displaced during the compression phase or c.2) a melt volume ΔV n displaced during the holding-pressure phase and the melt volume ΔV e displaced during the injection phase, wherein c.3) a corresponding screw travel Δs, Δs n and Δs e is measured in order to determine the displaced volumes ΔV, ΔV n and ΔV e, d) providing at least one limit value (G 1... G x... G n), wherein one or more recommendations for preferred intervention ranges or manipulated variables for adapting adjustment parameters of the injection-moulding machine are associated with ranges (Q ≤ G 1; G 1 < Q < G 2;... G n-1 < Q < G n, Q > G n) for the values of the quotient Q, e) determining in which of the ranges Q ≤ G 1; G 1 < Q < G 2;... G n-1 < Q < G n, Q > G n the value of the quotient Q lies, and f) outputting the preferred intervention ranges and/or manipulated variables for adapting the machine parameters of the injection-moulding machine which are associated with the determined range. a) providing an injection-moulding machine having the injection-moulding tool which is to be classified and which is intended for the determination, b) performing at least one injection-moulding cycle with injection-moulding machine settings in order to obtain a qualitatively adequate injection-moulding part, c) determining a quotient Q = Δp/Δs or Q = Δs n /Δs e characterizing a respective tool from c.1) a pressure rise Δp during the compression phase of the injection-moulding cycle and the melt volume □V displaced during the compression phase or c.2) a melt volume ΔV n displaced during the holding-pressure phase and the melt volume ΔV e displaced during the injection phase, wherein c.3) a corresponding screw travel Δs, Δs n and Δs e is measured in order to determine the displaced volumes ΔV, ΔV n and ΔV e, c.1) a pressure rise Δp during the compression phase of the injection-moulding cycle and the melt volume □V displaced during the compression phase or c.2) a melt volume ΔV n displaced during the holding-pressure phase and the melt volume ΔV e displaced during the injection phase, wherein c.3) a corresponding screw travel Δs, Δs n and Δs e is measured in order to determine the displaced volumes ΔV, ΔV n and ΔV e, d) providing at least one limit value (G 1... G x... G n), wherein one or more recommendations for preferred intervention ranges or manipulated variables for adapting adjustment parameters of the injection-moulding machine are associated with ranges (Q ≤ G 1; G 1 < Q < G 2;... G n-1 < Q < G n, Q > G n) for the values of the quotient Q, e) determining in which of the ranges Q ≤ G 1; G 1 < Q < G 2;... G n-1 < Q < G n, Q > G n the value of the quotient Q lies, and f) outputting the preferred intervention ranges and/or manipulated variables for adapting the machine parameters of the injection-moulding machine which are associated with the determined range.