Full operational missions will last for months at a time and have up to four crew members on board. (theverge.com)
Apparently to moderate expectations, the NASA press release announcing the date cautions that as a «development test, the likelihood of encountering an issue is higher than with operational missions.» (spacepolicyonline.com)
«There's no guarantee where it would come down,» says Paul Ondrus, project manager for operational missions at NASA's Goddard Space Flight Center in Greenbelt, Maryland. (sciencemag.org)