For this, the authors developed an index of wing damage (Wing Damage Index, WDI) divided into 4 categories, allant the 0 (no damage) to 3 (major damage). The details of this classification can be found in the article that you can get by clicking here .
Kwa hii, waandishi maendeleo index ya uharibifu mrengo (Mrengo Uharibifu Index, WDI) kugawanywa katika 4 makundi, Allanti ya 0 (hakuna uharibifu) kwa 3 (makubwa ya uharibifu).