In general, projects are commonly referred to by its initiator/solicitor. Solicited projects are those initiated by public sector, and unsolicited projects are those initiated by private sector.
Other ways of classifying projects are also available. Projects can be grouped based on its funding resources, operational cost, or scope of priority. By funding resources, a project can be wholly funded by private sector, co-funded by both the private and public sector, or wholly funded by the government. Such classification is applied in Mexico and Peru.
A project can also be grouped by its operational cost, as is used in Japan. It could be financially independent, where the operational cost comes from users revenue. Or, it could be a "purchase of service" type where the operational cost is covered by public sector. It could also be a mixed type of both.
Lastly, by scope of priority, a project can be determined as a national priority or local priority, as implemented in the Philippines.