On the Corrugator Scheduling page, the first column in front of today's orders shows programs waiting in Program Memory (usually in 1000 m²) for the corresponding grade. A dark yellow background indicates that those programs already have a starting time and program number, while a lighter background shows new schedules that are not tied and numbered yet.
A click on that field shows details on those schedules, and lets you recall some or all of them. (Of course, care must be taken not to recall schedules where production is imminent or has already started.
When a grade you are about to schedule shows such a number, then recalling the existing schedules and doing optimisation for all orders together will give a better overall result in most cases. After a recall, the pre-calculated result will change after a short time to reflect the changed situation.