Today we discuss interchangeability of parts.  This may sound trivial, but you probably would not even consider replacing your food processor blade with your lawnmower blade.  It would be obvious that these are not interchangeable.  However, there are times when a part needs to be replaced or design is reworked altering the composition, that is […]

Independent Test and Verification We are composing a glossary of testing terms and we take one from that work today and discuss here.   We welcome any and all that would like to contribute. Today we discuss development and independent test and verification.  A development organization can be structured in many ways. The development and testing […]

by: Shawn P. Quigley & Jon M Quigley Measurements and Bias Solely by the process of observing something we can alter the thing which is being observed. This is a known as the observer-expectancy effect.  This effect is born out of conscience and subconscious biases of the observer.  In the case of observing people, we […]

Verification and Validation The definition for verification and validation can be found at[1]:   We must express some disagreement with the activities associated with the individual areas. For example, testing is not limited to Validation. Testing is also a function of verification as we will use these techniques to understand if the instantiation of the […]

Testing and Repeat-ability  Repeat-ability of testing results is important to establishing cause and corrective actions. If it is not possible to repeat the sequence of events leading to a failure, it is not possible to replicate and therefore difficult solve the cause of the fault or failure.  The steps that evoked the problem are necessary […]