Software testing company

Optimizing Test Design Using Tools

Pairwise, Orthogonal Arrays and Classification Trees

Duration : 1-2 days


Many test engineers learn and get certified, but rarely use the test design techniques that they have been taught. I found it strange, but then realized that testers like to use tools, and if techniques were implemented via tools, they would have used them more.

Pairwise and Classification Trees are very good and efficient techniques for test design, prioritization of tests, and for saving time and money on performing the right tests first.

In this workshop, I shall present the techniques, and the tools (mostly freeware) to exercise them in your projects right after the training.

Hands-on exercises will be performed throughout the workshop to exercise participants in using the techniques via the tools.


Testers, testing team leaders and test managers, that would like to know these very efficient techniques for optimizing test design and their practical implementation, using proven tools (open source, free, commericial).

Learning Objectives

The objectives of this workshop is to give the participants a practical overview of

  • What is Pairwise and Orthogonal Arrays?
  • How to use the freeware ‘allpairs’ tool by James Bach, in your projects
  • How to use the freeware ‘PICT’ tool by Microsoft (for pairwise), in your projects
  • What is Classification Trees?
  • How to use the classification Trees/Testona Editor tool in your projects?

These questions and more are a part of the challenges we face in implementing ET today, whether it is in incremental models or more recently in iterative models (i.e. Agile).

The workshop emphasizes the implementation of the techniques using the freeware tools that will be provided. Through presentation, discussion, debate, brainstorming, questioning, and hands-on exercises – we shall learn how to implement those techniques in our projects.


Participants should have basic testing knowledge about testing life cycle, testing techniques and methods, test measurements.

Note: Class participants should have laptops/PC, with Windows 7/8/10, internet and email access and Office 2010 and up. Tools shall be provided and installed during the workshop as an install exercise at the beginning of the day.

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