VDA 19.1 requires a recovery rate >90%. You perform this by applying a test contaminant (e.g., ISO 12103-1 test dust) and measuring what you recover.
Yes. Medical devices, aerospace, and hydraulic equipment manufacturers often adopt VDA 19.1 as a best practice for technical cleanliness. Vda 19.1 Pdf
The most critical section of the PDF deals with extraction. How do you get the dirt off the part so you can measure it? VDA 19.1 defines several methods, the most common being . VDA 19
Use the standard’s decision matrix. For a complex aluminum housing, VDA 19.1 recommends with a defined frequency (35–45 kHz) and duration (5–10 minutes). Vda 19.1 Pdf