Improving the Test Process by Graham Bath · Erik van Veenendaal

Author:Graham Bath · Erik van Veenendaal
Language: eng
Format: epub
Publisher: Gerhard Rossbach
Published: 2014-03-14T16:00:00+00:00

5.5 Mixed Approaches

Most widely used test improvement models are used with a top-down approach. However, it is also recommended to apply bottom-up, analytical-based approaches. Top-down approaches have proven to be valuable in establishing improvements. They provide the means to set up a solid test engineering working environment and to establish product quality targets. Experiences in practice have shown significant benefits of this approach. However, organizations also need to apply a bottom-up approach, such as causal analysis of day-to-day problems and the gathering and analysis of process and product metrics. By setting up a measurement-based approach in their organizations, testing will become better understood. Remember, knowledge is an important basis for improvement. The models can be used to define the strategic vision for the next year(s) and provide long-term improvement goals. Bottom-up analytical approaches may well be used to identify some critical issues that need to be solved today rather than tomorrow and thus provide short-term improvement goals.

In practice, we almost never find just a model-based, content-based, or analytical approach being applied in isolation. It may be the case that one of these approaches is leading, but it will most likely be blended with another one. Therefore, in practice, we often have a mixed approach, even if a process model approach is chosen. Here are a couple of examples of mixed approaches, such as the use of analytical approaches within a process model or content model:

Usage of causal analysis during a TMMi test improvement program

Usage of metrics during a STEP test improvement program

More and detailed examples of this are provided in the next section.

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