Answer:
buffer
Step-by-step explanation:
Based on the information provided within the question it can be said that the addition of the extra staff is an example of a buffer. This term refers to obtaining extra of something (either inventory or staff) in order to protect the company or business from the negative effects that may arise from variations in demand. Such as in this case, the extra staff will protect the business from not being able to handle a large increase in demand if it were to occur.