What's the possibility to group, or lot the items together to make the process more manageable for you and the supplier? This typically works well if you can ask suppliers to price and bid in the same way you'd award i.e. you'd award the best value for each lot, rather than 'cherry pick' each individual item's best price.
Although a much smaller example, you'll see in the image, that during the event, suppliers just concentrated on the headline price, yet after, they were asked to complete the item level detail.
In SourcingPro live events, I try not to have suppliers bidding on more than 8-12 items, or in this case lots. The reason is the limitation of the screen and the need to scroll up and down to track activity.
If it is possible to group all items, then you could look at suppliers bidding by the lot during an event, and then using Ariba's reconcile function to provide item level pricing after the event. You may also look at using the offline Excel bidding function
Andrew Gill | Global eSourcing Manager | Reed Elsevier