When the funding ends, are there sponsor requirements for sustainability of the project?
Look to the guidelines for any requirements for the project to continue after funding ends.
Most research projects have a beginning and end date and are less likely to have requirements to sustain a part of the research project beyond the end date.
Some program grants and public service projects are expected to make an impact or to develop an institutional capacity for the implemented project to continue beyond the end date.
If sustainability is a required element, describe a plan for how the project will continue, who will be responsible for the maintenance, and how institutional change will enable the project to continue and possibly grow. See sample sustainability plans under Useful Links.