There is provided a method of regulating the formulation of a multi-component juice comprising a juice attribute profile, the method comprising providing a first and second component of the juice, each component having a component attribute profile supplying to a juice formulation zone the first component and the second component in a desired ratio and mixing the first and second components together to provide the juice or a precursor thereof to yield a target juice attribute profile responsive to a change or predicted change in at least one component attribute profile, supplying information concerning the attribute change to a data processing apparatus and calculating with respect to that change an adjustment in the ratio to reduce the deviation of one or more attributes of the juice attribute profile from the target juice attribute profile. A production system is also provided.
