1. Back to basics: Learn the maths
   1. Orthogonal arrays
   2. Allpairs algorithm
2. Learn more about the Pairwise testing
   1. All pairs testing
      1. What (ISTQB)
         1. A black-box test design technique in which test cases are designed to execute all possible discrete combinations of each pair of input parameters
      2. When
         1. the number of combinations to test is very large
   2. A Practitioner's Guide to Software Test Design by Lee Copeland
      1. http://dahlan.unimal.ac.id/files/ebooks/2004%20A%20Practitioner's%20Guide%20to%20Software%20Test%20Design_Good.pdf
   3. https://www.satisfice.com/download/pairwise-testing-a-best-practice-that-isnt
   4. https://www.developsense.com/pairwiseTesting.html
   5. http://www.pairwise.org/
   6. https://www.softwaretestinghelp.com/what-is-pairwise-testing/
3. Select automation tools
   1. PICT – ‘Pairwise Independent Combinatorial Testing’, provided by Microsoft Corp.
   2. IBM FoCuS – ‘Functional Coverage Unified Solution’, provided by IBM.
   3. ACTS – ‘Advanced Combinatorial Testing System’, provided by NIST, an agency of the US Government.
   4. Hexawise
   5. Jenny
   6. Pairwise by Inductive AS
   7. VPTag free All-Pair Testing Tool
   8. More tools http://www.pairwise.org/tools.asp
   9. All Pairs Example
      1. http://fit.c2.com/wiki.cgi?AllPairsExample
4. More practice