Development is not a delivery service

An occupied space station consumes supplies and needs replacement equipment, new investigations and ways to remove items no longer needed. NASA’s Commercial Resupply Services, or CRS, purchases cargo transportation to support the ISS. The service has value because of what it enables on the station, not simply because a rocket launches.

Commercial cargo is one part of the station’s wider supply system. Other national programs have also provided transport. CRS should therefore be understood as a particular service arrangement, not as the name for every uncrewed vehicle that has ever visited the ISS.

SpaceX CRS-1 illustrates the contracted delivery phase. Its archive card distinguishes a particular operational mission from the development work that preceded it.

NASA’s Commercial Orbital Transportation Services initiative, COTS, helped develop and demonstrate commercial cargo capabilities. CRS contracts purchased transportation services. The programs were related, but a successful development milestone and the delivery of an operational shipment are different achievements.

In a simple analogy, proving a new freight vehicle can complete a route is not the same as fulfilling a later delivery order. The customer still needs the right shipment, destination, date and handling. The distinction helps us keep COTS, CRS and Commercial Crew from becoming one vague commercial-space category.

NASA’s January 2016 CRS-2 announcement described cargo delivery, disposal and return services and selected three providers. That announcement records a procurement decision and the expectations at the time. It is not evidence that every selected vehicle had already flown every planned mission.

The practical question is what a particular service includes and what evidence confirms delivery. A contract value, a payload mass and a completed flight count measure different things. A fair account keeps the dates, service boundaries and operational results visible.