1. A method for managing a manufacturing plant for a production of carbon fiber pieces, the manufacturing plant including one or more equipment pieces for processing carbon fiber, the method comprising the steps of: collecting data related to quality parameters of carbon fiber to be supplied to the equipment, collecting real-time data related to operation parameters of at least one of said equipment which has received said carbon fiber, collecting actual production tines associated to at least one operation which is a part of a process for manufacturing one carbon fiber component from said carbon fiber, classifying the actual production times as added value production time or as wasted production time, in accordance with a predefined classification chart, calculating an efficiency parameter for said operation, wherein said efficiency parameter is calculated as a proportion between the sum of the added value production times, and a period of production time needed to complete said operation, comparing the calculated efficiency parameter with a desired value of the efficiency parameter, and if there is a deviation, then identifying causes for said wasted production times based on said collected data relative to quality parameters, said collected real-time data related to operation parameters, or both, during the process for manufacturing of said one carbon fiber component, correcting at least one of said quality parameters or said operation parameters in order to reduce said wasted production times for producing said one carbon fiber component, and, generating a preventive stop signal to interrupt the operation of one of said equipment pieces, when a cause for reduced efficiency has been detected, and taking a corrective action in said equipment and/or a collected parameter to avoid said cause for reduced efficiency.