This paper focuses on the constraints elicitation
in the combinatorial test design. Pair-wise testing, a common
combination testing approach, is an effective test planning
technique to find interaction faults from the relatively small set of
test cases. The test space is modeled by a set of parameters, their
individual values, and constraints on the value combinations.
Constraints reduce the test space; however, little consideration
has been given to the process of finding them. The goal of our
study is to establish an automatic constraints acquisition from
the requirements document. We try to establish a constraints
elicitation mechanism that helps to extract constraints from the
requirements document based on a linguistic approach. In this
paper, as the first step, we attempt to extract the coupling
strength between parameters from the requirements document.
We conducted a preliminary experiment on an ATM system
example and evaluated the feasibility of our approach.