It’s not enough anymore to just to be a so-called shipper of choice, nor is it always clear what it takes to be considered one. Container lines now are armed with tools to better determine which shippers forecast well, deliver cargo as booked, and provide flexibility on when they load. The difference in a shipper's grade can determine whether cargo is left on the dock or makes the booked sailing. Falling grades could mean that the carrier is less willing to grant a shipper's requested space allocations, or, in extreme cases, they may turn the "failing students" away. Shippers who are aware of how they rank along carriers’ various customer performance metrics can better understand how to get higher priority, even if their volumes don’t make them an automatic VIP account.