A method is described for supplying management services from a service centre for a plurality of industrial cleaning processes or machines at remote sites and/or operated by different organisations. A local unit is provided at each process or machine, which is programmed to forward process/machine information with a process/machine identification to the service centre. The information received from the local units is processed in a service centre computer to obtain management reports on the process or operation of the machines. In a system for monitoring a plurality of industrial cleaning processes or machines operated by at least one organisation, each process or machine uses a local unit with a plurality of sensors for sensing operating parameters of the process or machine. A service centre computer operated by a service organisation at a location remote from the location(s) of the local units is programmed to make a connection to a local unit and to obtain operating parameter data from the local unit periodically.