When to use: Estimating the yearly energy yield of a wind turbine at a given site. The site wind resource is modeled with a Weibull distribution (mean speed + shape factor k), and the turbine response with a power curve (cut-in, rated, cut-out). AEP is the integral of P(v)·f(v) across all wind speeds × 8760 h, reduced by wake and system losses. The capacity factor compares average output to rated power.