Modernization method of an existing passenger transport system

A method for modernizing an existing passenger transport system that is configured as an escalator or a moving walkway and which comprises a circulating conveyor belt, the method comprising:

• generating, from an existing supporting framework of the existing passenger transport system, a three-dimensional supporting framework model data set;
• determining, on the basis of the three-dimensional supporting framework model data set of the existing supporting framework, a core space of the existing supporting framework;
• determining customer-specific configuration data relating to new components to be installed, wherein only configurations are possible whose conveyor belt can be arranged within the core space;
• creating, using the customer-specific configuration data and component model data sets, a digital double data set of a complete passenger transport system including a provisional supporting framework model data set;
• marking contours of the three-dimensional supporting framework model data set of the existing supporting framework protruding or penetrating into the core space to be removed;
• and
• adapting the three-dimensional supporting framework model data set of the existing supporting framework in regard of the provisional supporting framework model data set of the digital double data set by component model data sets of adapter components taking into consideration the interface features of the provisional supporting framework model data set, and the geometric data of the three-dimensional supporting framework model data set of the existing supporting framework while disregarding its marked contours.