Each of these scenarios describes a different tool or technique from Activity Duration Estimating.

Write down which tool or technique is being described.

1. Kathleen comes up with three estimates (one where everything goes wrong, one where some things go wrong, and one where nothing goes wrong) for printing invitations, and averages them together to come up with a final number.
2. There will be two different catering companies at the wedding. Kathleen asks the head chef at each of them to give her an estimate of how long it will take each of them to do the job.
3. There’s a spreadsheet Kathleen always uses to figure out how long it takes guests to RSVP. She enters the number of guests and their ZIP codes, and it calculates an estimate for her.
4. Kathleen’s done four weddings that are very similar to Rob and Rebecca’s, and in all four of them it took exactly the same amount of time for the caterers to set up the reception hall