You cannot use Impact Model Designer (IMD) to create service models as IMD is Flash based and Flash EOL is on 31 Dec 2020. However, you can use the HARMAN browser to continue using IMD. Alternatively, you can use CMDB forms to create service models. For more information, see Configuring service models using CMDB forms.
Consult the following topics for information on how to design and create a service model.