Lifecycle Validation and Conditional Decision Support for Sustainable Urban Services in Brussels and New York City

Citizen-reporting records describe administrative outcomes, but their ability to support operational decisions depends on how those outcomes were produced. FixMyStreet Brussels and New York City’s non-emergency service-request system (NYC 311) were examined through endpoint auditing, censored lifecycle analysis, controlled queue reconstruction and temporally separated prioritization probes. The Brussels export contained 618,694 unique requests. A count-verified NYC extraction restored complete 2023–2025 coverage for four agencies and retained observable inherited cases. Closed-status records without usable closure times were excluded from primary estimation. Brussels administrative units differed substantially in 90-day closure probability and restricted mean open time. Observed Brussels 2023 P50, P90 and P95 closure ages were 7, 261 and 521 days. Restricted-source empty-queue first-in, first-out (FIFO) produced 32, 74 and 99 days. Complete initialization reproduced accounting throughput while overstating lifecycle quantiles. Frozen-rule comparisons were unstable across years, initial conditions and population definitions. In NYC 2025, the lower closed-case P95 point estimate was uncertain, while mature-arrival long-wait burden increased. These conditional results support explicit evidence boundaries for institutional sustainability. Administrative closure records remain informative, but the tested replay does not establish operational capacity, causal policy effects or demographic equity.