###BeginCaseStudy###
Scenario: 7
Test Estimation
You have been contracted to manage the acceptance testing of a new computer-based
reservation system for a travel agency. You have provided an approximate budget estimate
for the testing project based on previous experience with similar sized projects. However, the
management of the parent company of the travel agency will not commit to the budget until
detailed cost estimates are provided. The reservation system is being developed by a third
party However, detailed specifications of the software are available, as well as an estimate
of the total effort that will be spent in developing the software. The software is to be delivered
in four increments, and the functionality to be delivered in each increment has already been
agreed on.
###EndCaseStudy###

Which aspect in the test estimate is the main risk in this project?

A.
Quality of the specification

B.
Availability of end-users

C.
The costs of hardware and tools

D.
Unknown input quality due to third party development