Final answer:
The lead-time for fabric delivery that the manufacturer should factor into the production schedule is typically six months to one year.
Step-by-step explanation:
When considering the lead-time for fabric delivery, the garment manufacturer should take into account the time it takes to produce and ship the custom cotton fabric. This can vary depending on various factors such as the location of the fabric supplier and the complexity of the fabric design. Generally, a lead-time of six months or one year would be a reasonable estimate for fabric delivery.