Patent ID: 7181308

Claim:
A method for monitoring and analyzing a paper production process, in which the paper production process includes, as sub-processes: a wet end, including stock preparation a head box a wire section, and a dry end, including a press section, and a dryer section, the method comprising the steps of: measuring a number of variables from the process, also including electro-chemical measurements in the wet end, and with the aid of these variables, forming a fingerprint according to a good process situation with respect to runnability, and then storing the fingerprint in a memory, comparing the stored fingerprint with fingerprints obtained in an online momentary process situation, on the basis of the comparison, deriving an index of the difference, between the stored good process situation and the momentary process situation, and graphically displaying the index of the difference to the user, characterized in that the fingerprint according to a good process situation is made separately in several sub-processes, thus creating a deviation index for each sub-process, to be displayed to the user.