PPQ Model
/pee-pee-KYOO/🌲 Arboriculture●●● Advanced
The PPQ Model (Prognosis, Prescription, Quality) is a systematic approach to structural tree care. Prognosis evaluates the tree's current condition and predicts future development; Prescription determines the specific pruning interventions needed; Quality ensures cuts are made properly following biological principles. This model guides arborists from assessment through execution.
Etymology
Acronym: Prognosis, Prescription, Quality
Example
“Using the PPQ model, the arborist first assessed the tree's prognosis before writing a pruning prescription.”