Sources and reference approach
The site uses international public institutions for broad urban-systems concepts and avoids pretending one city's standards apply everywhere.
UN-Habitat — urban basic services
UN-Habitat Urban Basic Services frames access to urban services and infrastructure as a core urban-development issue; its work includes water and sanitation, energy, mobility and waste management.
UNDRR — infrastructure interdependencies and cascading risk
UNDRR's infrastructure interdependency work is used for the site's system-dependency and cascading-failure framework.
United for Smart Sustainable Cities / ITU
U4SSC, supported by UN organizations and coordinated through ITU and partners, provides current work on people-centred digital transformation, smart sustainable cities, interoperability and urban digital systems.
World Bank — urban development and resilience
World Bank Urban Development is used for current context on urban resilience, solid waste, flood protection, transport and city investment.
Local authority rule
Actual engineering standards, service levels, design capacity, emergency procedures, cybersecurity controls and utility operations must come from the responsible local authority, utility and qualified professionals.