Page 1

QATestLab 21, Garmatna str., Kiev, Ukraine ph.: +38(044)277-66-61 http://qatestlab.com/ contact@qa-testlab.com

Design Test cases should be designed to exert principles, which characterize the interrelation between the inputs and outputs of the component, where every principle corresponds to a singular possible combination of inputs to the component that have been expressed as Booleans. For every test case these should be clarified: • •

Boolean state for each effect Boolean state (true or false) for every reason

Analysis Cause-Effect Graphing uses such model of the logical interrelations between causes and effects for the component. Every cause is expressed as a condition, which can be true of false on an input, or combination of inputs to the component. Every effect is expressed as a Boolean expression representing results, or a combination of results, for the component having occurred. The model is characteristically represented as a Boolean graph relating the derived input and output Boolean expressions using the Boolean operators: • • • • •

AND OR NAND NOR NOT

(c) QATestLab, 2011  

http://qatestlab.com/                     


Black Box Test Techniques. Cause-Effect Graphing  

Design Test cases should be designed to exert principles, which characterize the interrelation between the inputs and outputs of the compon...

Advertisement
Read more
Read more
Similar to
Popular now
Just for you