PerenOS enters at whatever stage ecological reasoning remains open — before spatial decisions, after them, or alongside design software. Practitioners can define communities, take outputs into their CAD tool, and return to refine the design.

The design unit is the plant community. Species interactions, succession, and competition are modelled within each one — riparian edge, meadow zone, woodland margin — and reasoned about across the landscape as a whole.

PerenOS stays with the project through establishment, monitoring, and adaptive maintenance. Where conditions diverge from projections, adaptations are proposed against the original reasoning record.

Every output carries the reasoning that produced it: site inputs considered, trade-offs resolved, uncertainties named at the level of confidence available. The reasoning record itself is the documentation.

PerenOS proposes, justifies, and surfaces uncertainty — but the practitioner holds the design decision. Outputs are arguments to evaluate, not specifications to accept.