Assessing system quality
Stop-the-line is a technique used in manufacturing introduced by Taiichi Ohno of TPS, where a big red button is pushed whenever someone sees a critical quality issue in the production line. The idea was products with quality issues moved to production have much more severe consequences than stopping the line and fixing problems as and when they occur. Early detection and rectification of defects minimizes wastage. Hence, early and continuous quality assurance is required for the efficient delivery of quality solutions with optimal cost of development.
Brian Marick's Agile testing quadrants are a useful tool to understand various aspects of Agile testing. An adapted version of this was developed by Janet Gregory and Lisa Crispin is shown on the left side of the following figure:
Figure 9.17 – Agile testing quadrants and risk-based performance testing model
As shown in the figure, architecture quality testing is in Q4...
