Demand and
capacity management system (1), configured as a web-based data service (200) in an automotive network for communication between supplier and customer, comprising: - at least one
data management system (2) configured as a cloud-based or central
server, - at least one customer device (3) comprising an associated demand and
capacity management application (3.3), - at least one supplier device (4) comprising an associated demand and
capacity management application (4.3), - at least one first data room connector (3.1) which can be detachably connected or linked to the customer device (3) as a
communication interface, - at least one second data room connector (4.1) that can be detachably connected to or is connected to the supplier device (4) as a
communication interface, wherein the first data room connector (3.1) is configured to communicate with the
data management system (2) via an associated connection and with the supplier device (4) directly via communication channels (6.1, 6.2), and the second data room connector (4.1) is configured to communicate with the
data management system (2) via an associated connection and with the customer device (3) directly via the communication channels (6.1, 6.2), wherein the web-based data service (200) is configured to: a) Entering a
coupling of at least one of the data room connectors (3.1, 4.1) and receiving a data room connector identifier or network identifier (108) and writing the data room connector identifier or network identifier (108) to the data
management system (2), b) Creating a
data space connector asset (112) for expected data on this coupled
data space connector (3.1, 4.1), c) Receiving an initial request (101) of the expected data directly via the communication channels (6.1, 6.2) between the
data space connectors (3.1, 4.1), d) Comparing the expected data with relevant internal data, e) based on the matching results, creating a second requirement, f) optionally retrieve from the data
management system (2) a network identifier (108) of the receiving data room connector (3.1, 4.1), g) Transmitting the second request (103) and the associated network identifier (108) of the receiving data space connector (3.1, 4.1) to the coupled data space connector (4.1, 3.1) directly via the communication channels (6.1, 6.2) between the data space connectors (3.1, 4.1), h) Establishing one of the communication channels (6.1, 6.2) between the coupled data space connector (3.1, 4.1) and the receiving data space connector (3.1, 4.1) and i) Sending the second request (103) to the receiving data room connector (3.1, 4.1).