98% might be possible in ideal scenario, but I think about 90 % utilization is pretty good.
During pallet optimization studies, usually the oppotunity areas are..
Loading patterns not always optimal
Height utilization insufficient
Different box orientations
By optimising the following, you may improve pallet utilization.
• Improving loading patterns
• Improving height utilisation
1. Identical layers
2. Given orientation
3. Optimized orientation
4. Different layer on top
5. Free combination of layers
• Utilisation of overhang
1. Horizontal overhang
2. Vertical overhang
You may reap substantial benefits in this by including your operations and marketng team, machine experts (Palletiser Programmer, material handling specilaists), may be outside consultant.
All the very best!