Hello Sivaranjani,
Its a few steps, but essential in OpenLCA modelling.
1: Create your own process, with an associated output flow.
2: Choose a process that you want the previously created process to link to.
3: Add a new flow as an input. Choose the provider for the process to be the process you created in step 1.
4. Save the process.
Now the 2 processes are connected. Check that you use the correct amount, so that it corresponds to the real product system you are trying to model. When you analyse the process from step 2, you will see in the flow diagram, that the process from step 1 is a supplier.
Good luck
