How do you really know how good your software is? Many traditional measures only look at the quantitative aspects of quality. Here's a model to measure and analyze subjective—or qualitative—data about software quality.
Improving customer satisfaction should be a primary goal of process improvement programs. So how satisfied are our customers? One of the best ways to find out is to ask them. Here are techniques for creating a useful survey and interpreting the results.
A QA manager is often faced with measuring the impossible. Here is a simple, post-ship metric to help judge the test effort's effectiveness. The Quality Barometer method uses the bug counts found during testing, calculates a percentage, and then uses that percentage as the defect target number that can be tolerated after shipment.
The theory underlying a measurement must take into account at least nine factors. This article defines these nine factors (e.g., the scope of the measurement, the scale of the instrument, and the variation of measurements made with the instrument) and applies them to a few examples.