Operating method for a roll stand in which a metal strip is rolled, - wherein a control device for the roll stand determines by means of a working cycle in each case a number of manipulated variables for a corresponding number of evenness members of the roll stand and actuates the evenness members according to the manipulated variables determined, characterised in - that the control device implements a first optimizer (9, 9'), which initially provisionally sets the current correction variables (s) and determines a totality of evenness values (f) according to the relationship ƒ s = ƒ 0 + W ⋅ s − s ' or ƒ s = ƒ 0 + W ⋅ s, wherein -- f is the totality of evenness values (f), -- s is a totality of the current correction variables (s), -- f0 are initial evenness values, -- W is an effectiveness matrix and -- s' is a totality of the correction variables (s') in the preceding working cycle, and then minimises the relationship ‖ ƒ s − ƒ * ‖ + α ‖ s − s 0 ‖ + β ‖ s − s ' ‖, by varying the current correction variables (s), wherein -- f* is a totality of evenness target values (f*), -- s0 is a totality of target values for the correction variables (s) and -- α and β are weighting factors (α, β), - that the first optimizer considers linear ancillary conditions when determining the current correction variables (s), - that the linear ancillary conditions have the form C ⋅ s ≤ B or the form C ⋅ s ≤ B and s − s ' < c, wherein C is a matrix, B is a vector having the ancillary conditions to be upheld by the current correction values (s) and c is a vector having the ancillary conditions to be upheld by the difference between the current correction values (s) and the correction values (s') of the preceding working cycle and - that the control device determines the manipulated variables for the evenness members taking account of the varied current correction variables (s). - wherein a control device for the roll stand determines by means of a working cycle in each case a number of manipulated variables for a corresponding number of evenness members of the roll stand and actuates the evenness members according to the manipulated variables determined, - that the control device implements a first optimizer (9, 9'), which initially provisionally sets the current correction variables (s) and determines a totality of evenness values (f) according to the relationship ƒ s = ƒ 0 + W ⋅ s − s ' or ƒ s = ƒ 0 + W ⋅ s, wherein -- f is the totality of evenness values (f), -- s is a totality of the current correction variables (s), -- f0 are initial evenness values, -- W is an effectiveness matrix and -- s' is a totality of the correction variables (s') in the preceding working cycle, and then minimises the relationship ‖ ƒ s − ƒ * ‖ + α ‖ s − s 0 ‖ + β ‖ s − s ' ‖, by varying the current correction variables (s), wherein -- f* is a totality of evenness target values (f*), -- s0 is a totality of target values for the correction variables (s) and -- α and β are weighting factors (α, β), -- f is the totality of evenness values (f), -- s is a totality of the current correction variables (s), -- f0 are initial evenness values, -- W is an effectiveness matrix and -- s' is a totality of the correction variables (s') in the preceding working cycle, -- f* is a totality of evenness target values (f*), -- s0 is a totality of target values for the correction variables (s) and -- α and β are weighting factors (α, β), - that the first optimizer considers linear ancillary conditions when determining the current correction variables (s), - that the linear ancillary conditions have the form C ⋅ s ≤ B or the form C ⋅ s ≤ B and s − s ' < c, wherein C is a matrix, B is a vector having the ancillary conditions to be upheld by the current correction values (s) and c is a vector having the ancillary conditions to be upheld by the difference between the current correction values (s) and the correction values (s') of the preceding working cycle and - that the control device determines the manipulated variables for the evenness members taking account of the varied current correction variables (s).