From some of this discussion there is a degree of inference made about its importance. Some customers are not going to get what they wanted on time unless some push planning is applied. There is much more at stake. Push planning is only one aspect of scheduling. Therefore, enough A must be made to satisfy demand for the full length of B's campaign.
Some questions jump out.
These questions will impact the sequence picked for the schedule and the size of the campaigns for all affected products. Capacity T he challenge of scheduling has to do with the satisfying multiple objectives simultaneously. Customer demand was the first. The second is physical capability, having enough capacity. Every time equipment is changed over from one product to another, capacity is lost.