Thanks for the Reply Laurent.
I'm not very technical, but from what I understand above it looks like the system has a way of figuring out the range using that cs_sc_item_data-leadtime value, and it has a way to figure out the start time of the service using sy-datlo?
Is this a standard solution within SRM? Do current companies use the standard OCI interface to purchase services including a valid delivery date range?
Regards,
Andrew