For questions concerning building up of a situation and starting with limited resources and options. Building a situation from the ground up with nothing but what is on hands, and with a goal through iterations propel the situation to a brighter/bigger future. Do not use this tag as the only tag on a question because it describes the paradigm, not the topic.
For questions about time travelers, post-apocalypse restoration of humanity, space rangers, space colonists, generation ship travelers - all who can't take all they need with themselves, in a material form, but may have the knowledge and they need some plans about how to develop from a local situation of limited resources and opportunities to what they know is possible, abundance and prosperity.
Can be applicable to other topics with similar nature of expansive growth through iterations and available knowledge which exceeds the current capacity of using it. It can be premeditated scenarios, planned development or survival situations.