Abstract: Provided is a tool for monitoring a complex technical system having at least one diagnostic user and a plurality of system users, the tool having: a first diagnostic component for a first diagnostic user, the first diagnostic user component comprising: a first communication interface for selectively communicating with multiple system users and having a filter for sorting communications with individual system users into individual conversation streams, wherein individual communications are assigned time stamps; a first communication display interface for selectively displaying an individual conversation stream relating to an individual system user as a continuous sequence wherein the first communication interface portion is arranged to update in response to further communication a first parameter display interface for displaying technical system parameters in a first subset of monitored parameters relating to the individual system user's technical configuration status and usage history; a first parameter confi