Systems Engineering and Its Application to Industrial Product Development by Eugenio Brusa Ambra Calà & Davide Ferretto

Author:Eugenio Brusa, Ambra Calà & Davide Ferretto
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

The process starts only after a preliminary check, aimed at verifying that the Laying Head can be safely unlocked and can be made rotating. Looking at the IBD, it can be easily read that to “Start the process ” the system should be able to provide a preliminary check as soon as requested by The Operator . It sends some data to the Monitoring and Signaling functions, respectively, to unlock the system and display the system status. The Monitoring function sends even a message to the Signaling function. The function of displaying the system status is then used by the Monitoring and emergency system.

Similarly, Fig. 6.9 describes the use case “Stop the process ”. The process can be stopped either by The Operator or by the Monitoring and emergency system. In regular operation , the process is stopped when the wire rod length reaches a required value, while in case of failure, an emergency stop is launched. Therefore, the IBD shows that the Monitoring and Emergency system interacts with the Control function to request an emergency stop and with the Measuring function to monitor the length of the wire rod. The Operator interacts only with the Signaling function, through the displayed information about the system status. The Signaling function receives information on the requested stop from the Control function, in case of either emergency or normal operation .

Fig. 6.9IBD of the use case “Stop the process ”

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