IBM's ETVX Concept

ETVX Concept

         IBM has introduced this ETVX model in 80's to document their processes.

'E' stands for the entry criteria which must be satisfied before a set of tasks can be performed.

         Ex: Like Approved SRS/FRS documents are required for the design of application / for Testing

  'T' is the set of tasks / procedures to be performed

          Ex: tasks include design test cases, reviews...etc

 'V' stands for the verification & validation process to ensure that the right tasks are performed
          Ex: validate the application as per the requirements and review the testing

 'X' stands for the exit criteria or the outputs of the tasks.

          Ex: The documents prepared like Test Log / defect reports / Test summary reports...etc

 If an activity fails in the validation check, either corrective action is taken or a rework is ordered. It can be used in any development process. Each phase in the process can be considered as an activity and structured using the ETVX model. If required, the tasks can be further subdivided and each subtask can be further structured using the ETVX model