Final answer:
Variations in demand relative to capacity can result in an increase in waiting time for customers, a decrease in customer satisfaction, and an increase in customer complaints, but not an increase in production efficiency.
Step-by-step explanation:
Variations in demand relative to capacity can result in all of the following scenarios except an increase in production efficiency. When demand exceeds capacity, it can lead to an increase in waiting time for customers, a decrease in customer satisfaction, and an increase in customer complaints.