Design of Experiments - US Army Conference on Applied Statistics

Covering arrays and s<strong>of</strong>tware testing
Let foo(m,n,p,q) denote a s<strong>of</strong>tware
system with four input parameters each <strong>of</strong>
which has two possible values 1, 2.
Thorough testing would require a test case
for each point in the input space (i.e. 16 test
cases).
What if you can only afford 8 (or fewer) test
cases?
1 1 1 1
1 1 1 2
1 1 2 1
1 1 2 2
1 2 1 1
1 2 1 2
1 2 2 1
1 2 2 2
2 1 1 1
2 1 1 2
2 1 2 1
2 1 2 2
2 2 1 1
2 2 1 2
2 2 2 1
2 2 2 2