Rolling method in a rolling plant to produce coils of strip with a thickness varying from 0.7 mm to 20 mm, for all qualities of steel which can be cast in the form of thin slabs with a thickness comprised from 30 mm to 140 mm, said rolling plant comprising at least: - a continuous casting device; - a tunnel furnace for maintenance/equalization and possible heating disposed downstream of the continuous casting device, the tunnel furnace having a length such as to act as an accumulation store for the slabs when it is necessary to overcome an interruption of one or both of said roughing and finishing trains, because of incidents or because of a programmed change of the rolling rolls, in this way avoiding stoppages of said casting device; - a rolling train, disposed downstream of said tunnel furnace, consisting of a roughing train comprising from 1 to 4 rolling stands (18a, 18b, 18c) and a finishing train comprising from 3 to 7 stands (21a-21e); - a rapid heating unit, for example an inductor unit, interposed between said roughing train and said finishing train, said rapid heating unit being removable automatically or manually from the rolling line; said method being characterized in that the plant is made to work either in coil-to-coil mode for final thicknesses of the strip from 1.0 mm to 20.0 mm or in semi-endless for final thicknesses of the strip from 0.7 mm to 2.0 mm or in endless mode for final thicknesses of the strip from 0.7 mm to 4.0 mm, wherein said tunnel furnace has a potential to accommodate up to 5 coils to manage possible stoppages in coil-to-coil mode; wherein • no interstand inductors are provided in the finishing train and wherein • the specific position of the rapid heating unit which determines the number of stands (18a, 18b, 18c) which form the roughing train, disposed upstream of the rapid heating unit, and the number of stands (21a-21e) which form the finishing train, disposed downstream of the rapid heating unit, is calculated as a function of the product of the thickness and speed of the thin slab, said product being in turn a function of the hourly productivity in tons/hour desired to be obtained. - a continuous casting device; - a tunnel furnace for maintenance/equalization and possible heating disposed downstream of the continuous casting device, the tunnel furnace having a length such as to act as an accumulation store for the slabs when it is necessary to overcome an interruption of one or both of said roughing and finishing trains, because of incidents or because of a programmed change of the rolling rolls, in this way avoiding stoppages of said casting device; - a rolling train, disposed downstream of said tunnel furnace, consisting of a roughing train comprising from 1 to 4 rolling stands (18a, 18b, 18c) and a finishing train comprising from 3 to 7 stands (21a-21e); - a rapid heating unit, for example an inductor unit, interposed between said roughing train and said finishing train, said rapid heating unit being removable automatically or manually from the rolling line; • no interstand inductors are provided in the finishing train and wherein • the specific position of the rapid heating unit which determines the number of stands (18a, 18b, 18c) which form the roughing train, disposed upstream of the rapid heating unit, and the number of stands (21a-21e) which form the finishing train, disposed downstream of the rapid heating unit, is calculated as a function of the product of the thickness and speed of the thin slab, said product being in turn a function of the hourly productivity in tons/hour desired to be obtained.