Illig value

The “Illig value” is the benchmark for technical cleanliness in the entire automotive industry (VDA 19.2). It makes it possible to evaluate a large number of possible particles with just one measure and to specifically evaluate the risk of contamination based on the particle precipitation and to define countermeasures.

The traditional particle measurement for analyzing the particulate contamination in the ambient air is carried out using particle precipitation photometers, also known colloquially as particle traps. Petri dishes of a specified size are laid out in a certain area for a predefined time and the sedimented particles are then microscopically counted and automatically evaluated. Based on this, the Illig value is calculated, which can be used both for checking the cleanliness of the respective area and for assessing the cleanliness of comparable components. For a clean analysis of the value stream, clean critical zones or material streams can be identified and compared with one another by comparing the measured Illig values. The ZVEI shows this using the example of cleaning a 7-pin HV connector strip. According to VDA 19.2, the sample evaluation can be carried out in the same way for special groups of particles, such as, for example, metallic contamination particles. With the knowledge of the contamination that is critical for the zone or material flow, statements about subsequent contamination along the value flow can be made with the help of the Illig value.

The Illig value goes back to the German engineer Hans Illig (born April 11, 1959 in Sippersfeld ) from Mannheim.

Individual evidence

^ Association of the automotive industry: Technical cleanliness in the assembly area, logistics, personnel and assembly facilities . Ed .: Association of the Automotive Industry. 1st edition 2010. Volume 19 , no. 2 . Quality Management Center in the Association of the Automotive Industry (VDA QMC), Berlin 2010.
↑ Technical cleanliness in electrical engineering - dirt is matter in the wrong place. (PDF) In: www.zvei.org. ZVEI - Zentralverband Elektrotechnik- und Elektronikindustrie e.V., October 2018, accessed on March 10, 2019 .
↑ Ronny Zwinkau (host Dipl.-Ing.): Final report to the IGF project Access purity material handling systems. (PDF) In: www.gvb-ev.de. TU Dortmund University, Institute for Production Systems, Professorship for Work and Production Systems, July 30, 2014, accessed on March 10, 2019 .
↑ Julia Löffler: Mannheimer "Illig-Wert": New benchmark in the entire German automotive industry. (PDF) In: technikforum No. 1/2011. VDI Association of German Engineers, January 31, 2011, accessed on March 10, 2019 .

[1] Association of the automotive industry: Technical cleanliness in the assembly area, logistics, personnel and assembly facilities . Ed .: Association of the Automotive Industry. 1st edition 2010. Volume 19 , no. 2 . Quality Management Center in the Association of the Automotive Industry (VDA QMC), Berlin 2010.

[2] Technical cleanliness in electrical engineering - dirt is matter in the wrong place. (PDF) In: www.zvei.org. ZVEI - Zentralverband Elektrotechnik- und Elektronikindustrie e.V., October 2018, accessed on March 10, 2019 .

[3] Ronny Zwinkau (host Dipl.-Ing.): Final report to the IGF project Access purity material handling systems. (PDF) In: www.gvb-ev.de. TU Dortmund University, Institute for Production Systems, Professorship for Work and Production Systems, July 30, 2014, accessed on March 10, 2019 .

[4] Julia Löffler: Mannheimer "Illig-Wert": New benchmark in the entire German automotive industry. (PDF) In: technikforum No. 1/2011. VDI Association of German Engineers, January 31, 2011, accessed on March 10, 2019 .