  Inspections and testing are two of the most commonly performed software
quality assurance processes today. Typically, these processes are applied in
isolation, which, however, fails to exploit the benefits of systematically
combining and integrating them. In consequence, tests are not focused based on
early defect detection data. Expected benefits of such process integration
include higher defect detection rates or reduced quality assurance effort.
Moreover, when conducting testing without any prior information regarding the
system's quality, it is often unclear how to focus testing. A systematic
integration of inspection and testing processes requires context-specific
knowledge about the relationships between inspections and testing. This
knowledge is typically not available and needs to be empirically identified and
validated. Often, context-specific assumptions can be seen as a starting point
for generating such knowledge. Based on the In2Test approach, which uses
inspection data to focus testing, we present in this article how knowledge
about the relationship between inspections and testing can be gained,
documented, and evolved in an analytical or empirical manner. In addition, this
article gives an overview of related work and highlights future research
directions.
