Assembly method

A method of assembling a plurality of individual parts to manufacture a workpiece, which comprises the steps of

• (a) placing each single one of the individual parts in a respective holder in a preparation stage, the holder holding each single individual part in a predetermined position, and mounting a plurality of said holders on a transport carrier,
• (1) at least two of said holders on the transport carrier holding single individual parts of the same type whereby one of the two holders serves as a reserve holder for said individual part of the same type if one of the individual parts of the same type is defective,
• (b) conveying assembly support along a conveying path to sequentially arranged work stations whereat the respective single individual parts are assembled on the assembly support,
• (c) conveying the transport carrier from the preparation stage to respective ones of said work stations along said conveying path for alignment of respective ones of said holders with the assembly support at the respective work stations,
• (d) removing respective ones of said single individual parts from the respective holders at the respective work stations and placing said removed parts on the assembly support for assembly thereon,
• (1) the assembly support and the transport carrier being conveyed along said conveying path from one of the work stations to a subsequent one of the work stations,
• (e) returning the transport carrier to the preparation stage after the single individual parts held in the respective holders have been removed, and
• (f) again placing a respective single one of the individual parts in a respective holder in the preparation stage in a predetermined position.