The suppliers would try their products in the different sizes of
plastic tray and agree with commercial and retail the quantity of units
and the size of the tray. There were also some important additional
benefits from having a family of tray sizes especially for promotion
lines. For example, the shallow tray might be right for their product.
But during a promotion campaign they could justify putting two
layers of the product and using a deep tray, which would also improve
handling and logistics efficiency. Getting a balance between shallow
and deep trays from the RSU was easy; they might have 10 lines in
total with two on promotion at any one time. If the actual volume
varied from the forecast then they did not have a panic about specially