Welcome, client. I'm happy to report that your project will definitely, absolutely, 100% be done in 2 days.
Here's a breakdown of our wildly unrealistic schedule:
We're confident that with our team of expertly over-caffeinated developers, we can meet your deadline of... um... 3 weeks?
Would you like to see more optimistic estimates? Here's a more optimistic one.
Or perhaps you'd rather see a more pessimistic estimate? Here's that too.
We'll totally deliver on time. (Just kidding, we won't.)