TDD and ETVX – Can they be equated?

In Test-Driven Development (TDD) developer writes an (initially failing) automated test case that defines a desired improvement or new function, then produces the minimum amount of code to pass that test and finally refactors the new code to acceptable standards.

ETVX stands for Entry-Task-Verification-eXit. IBM introduced the ETVX model during the 80’s. In this model any process is broken down  down to multiple tasks which would be performed linearly. You will enter a task only if the entry criteria is met and exit the task when verification is complete and the exi criteria is met.


  • Entry Criteria = Working software
  • Exit Criteria = Passing the automated test
  • Task = Write the code
  • Verification = Run the automated test

So, can we say that TDD follows ETVX model or is the similarity only superficial?

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4 Responses to “TDD and ETVX – Can they be equated?”
  1. Trivikram says:

    Thanks for an informative article.

  2. MAHADEVAN says:

    I think they both are independent…TDD is a method of software development on its own(with new mindset required), may be we can fit in ETVX into TDD and ETVX can be applied to many other methods and process

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