A state information handling server, a process control system including such a state information handling server as well as to a method, computer program and computer program product for handling state information. The state information handling server obtains state information from user terminals of users in the process control system, where the state information of at least two users includes information about user operations in relation to objects in a process control screen, inspects the state information with regard to objects in the process control screen, which inspecting includes determining, for each user, if the corresponding user targets an object in the process control screen, and performs a user informing activity if objects in the process control screen that at least two users have targeted is the same or are linked.

The invention relates to a method for producing a product compilation, which comprises at least one main product and at least one or more subproducts. The main product or a subproduct is provided as a leading object with machine-readable data, which comprise a process key (1), which comprises at least one uniform resource identifier (URI, 2) and a control element region (3), wherein, in the production process, at least one machine recognizes the process key (1) and a work step of the machine is triggered by the process key (1).

A method for controlling machines (M1, M2, . . . ), which are provided for the processing of objects (O1, O2, . . . ), includes introducing an object (O1, O2, . . . ) into a working region of a machine (M1, M2, . . . ) and accessing, in a local environment of the machine (M1, M2, . . . ), a process key (PS1, PS2, . . . ), which is associated with the object (O1, O2, . . . ) and which contains at least one URI (unified resource identifier). The object (O1, O2, . . . ) is then processed using the URI contained in the process key (PS1, PS2, . . . ).

A state information handling server, a process control system including such a state information handling server as well as to a method, computer program and computer program product for handling state information. The state information handling server obtains state information from user terminals of users in the process control system, where the state information of at least two users includes information about user operations in relation to objects in a process control screen, inspects the state information with regard to objects in the process control screen, which inspecting includes determining, for each user, if the corresponding user targets an object in the process control screen, and performs a user informing activity if objects in the process control screen that at least two users have targeted is the same or are linked.