Quality filter mapping is part of the value stream mapping[1] toolkit and is used to analyse processes/functions with respect to quality.
The results of a quality filter map shows how much waste is being generated within an organisation at each stage of the process.
Three types of quality[2] are measured as part of the model: Quality failures/defects are represented as a ratio (typically parts per million).
Results of quality filter mapping are commonly used to feed into continuous improvement plans.
A revised map is then generated after implementation of improvement plans to measure the result of improvements.