If you employ a certain number of people, it's assumed that they're doing other things. When you have to devote them to a different project, you're doing a few

If you employ a certain number of people, it's assumed that they're doing other things. When you have to devote them to a different project, you're doing a few things: 1. Making your staff work overtime. 2. Leaving other work undone. 3. Hiring new staff to make up for this. 4. Keeping redundant personnel on board in case something like this happens again. 5. Hiring temporary contractors and services to help you with this specific task. All of these cost money.