| Factor | Score | ||||
| 5 | 4 | 3 | 2 | 1 | |
| Trunk | Sound and solid throughout | Minor damage | Early decay signs | Extensive decay, hollowness cambium damage | Same as two, but cross-section is a half circle |
| Crown | Dense, evenly balanced crown | Dense, slightly unbalanced crown | Thin or severely imbalanced crown | Thin and slightly imbalanced crown | Thin and severely imbalanced crown |
| Root | Three or more evenly balanced root flares | Three or more slightly unbalanced root flares | Less than three or severely unbalanced root flares | No root flares & structural root (2 to 15 cm deep) | Structural roots (>15 cm deep) |
| Structure | No major limbs missing, broken, or dead no narrow crotches; good radial distribution | Narrow crotch on a major limb | One of major limbs is dead or broken | Two or three major limbs with narrow crotches & one broken or dead major limb | Two or three major limbs with narrow crotches & broken or dead major limbs |
| Growth | >15 cm annual twig elongation | 10 - 15 cm annual twig elongation | 5 - 10 cm annual twig elongation | 2 - 5 cm annual twig elongation | <2 cm annual twig elongation |
| Pest | No insect or disease problems | Minor insect or disease problems | Minor insect & disease problems | Serious disease or insect problems | Serious disease & insect problems |
| Life | >50 years | 30 to 50 years | 20 to 30 years | 10 to 20 years | <10 years |
| expectancy |