The kernel of the logic used to identify the best process improvement objects in the VISTALIZER® Report is thoroughly discussed in section 184.108.40.206 of my book High-Performance Process Improvement (p. 140-142).
In essence, the identification logic distinguishes the trivial many from the vital few improvement objects in a HPPI compliant way. These vital few objects are then further analyzed to prepare an adequate input to the overall synthesis. This improvement object identification logic is thus a very crucial backbone to assure an overall high process improvement yield level, achieved with the use of as little resources as possible.
One of the essential building bricks of a high-class process improvement plan is the use of a high-class logic for identifying the best (overall) process improvement objects. This calls for a robust analysis logic that has to master multiple analyses to produce a high-class process analysis that is fit for the synthesis. In the end, improving the process performance is all about selecting the best improvement objects for the implementation phase. If the improvement object identification phase is inadequate, it is clear that this will affect the synthesis negatively. As a result, wrong improvement objects are likely selected for the implementation phase, resulting in a low PIY level.