Commercial Crew
DraftNASA’s programme to procure crew transport to the International Space Station from commercial providers under firm fixed-price contracts. It is the clearest natural experiment in space procurement policy, and its results are cited in essentially every argument about how agencies should buy.
- Purpose
- Restore US crew launch capability after the Space Shuttle retired in 2011
- Model
- Firm fixed-price, outcome-specified, two providers
- Providers
- SpaceX Crew Dragon; Boeing Starliner
- Precedent
- COTS and CRS, which applied the same model to cargo
The structure
The programme’s design choices are the substance of the experiment.
Outcome specified, not design. NASA stated the requirement, transporting crew to the ISS safely, and left the vehicle design to the providers. This is the opposite of traditional practice, where the agency specifies the design in detail.
Firm fixed-price. Providers bore overrun risk rather than the government.
Two providers. Redundancy at the architecture level rather than the component level, so a single provider’s failure or delay would not end US crew access.
Milestone payments. Funding released against demonstrated progress rather than against incurred cost.
Provider retains the vehicle. Providers own their vehicles and may sell seats to other customers, which gives them a business beyond the NASA contract and an incentive to control cost.
Outcomes
The two providers diverged sharply, which makes the experiment more informative than a single-provider programme would have been.
| Crew Dragon | Starliner | |
|---|---|---|
| First crewed flight | 2020 | Considerably later |
| Operational cadence | Regular rotation flights, plus private missions | Limited |
| Development difficulties | Parachute and abort testing; a capsule lost in a ground test anomaly | Software errors on the first uncrewed flight; valve issues; propulsion anomalies |
| Financial outcome | Within contract | Large charges taken against the fixed-price contract |
The Starliner result is the important half for policy purposes. A fixed-price contract transfers risk to the contractor, and Boeing absorbed substantial losses. That is the mechanism working as designed from the government’s perspective, and it is a genuine warning that the model punishes misestimation severely.
It also demonstrates why two providers mattered. Had NASA selected only one, and had it selected the one that struggled, the programme would have failed to deliver on time with no fallback.
Certification
Human-rating is a formal process with defined requirements for loss-of-crew probability, abort capability across the flight envelope, structural margins and software assurance.
The tension the programme exposed is real. Fixed-price contracting gives the provider design authority, while human-rating requires the agency to be satisfied about safety. Reconciling provider autonomy with agency oversight required NASA to maintain deep insight into designs it did not specify, which is more involved than a pure service purchase and less prescriptive than traditional oversight.
The cost result
Independent assessments consistently find the programme delivered crew transport substantially below what a traditional cost-plus development would have required, and it produced two vehicles rather than one.
Two qualifications belong with that claim.
The comparison baseline is estimated, not observed. No cost-plus crew vehicle was developed in parallel, so the counterfactual is a projection.
Development was partly funded by other means. Both providers had other revenue and prior investment, and the earlier COTS and CRS programmes had already matured capability that Commercial Crew built on.
Neither qualification overturns the finding, and the honest statement is that the model delivered well against a reasonable estimate of the alternative.
What transfers and what does not
The programme is invoked as a template for many things it does not fit, so the boundary conditions are worth stating.
| Condition | Present in Commercial Crew | Consequence if absent |
|---|---|---|
| A definable outcome | Yes: crew to the ISS and back | Fixed-price on an undefined outcome is unbiddable |
| Bounded technical risk | Largely; capsules and launch vehicles were understood | Novel work cannot be fixed-price without enormous risk margin |
| More than one credible provider | Yes | A single provider on fixed-price has no competitive pressure |
| A market beyond the agency | Partly: private astronaut missions | Without one, the provider has no incentive beyond the contract |
| Prior capability maturation | Yes, through COTS and CRS | Starting from nothing lengthens development substantially |
Applying the model where these do not hold is where fixed-price contracting has produced difficulty, and several defence space programmes illustrate that. Genuinely novel development, where nobody can estimate the cost, is the case cost-plus exists for. See Space agencies.
Significance
Commercial Crew changed procurement expectations more than it changed technology. It demonstrated that an agency can specify an outcome, hold a price, fund competitors, and receive a working system, for work that was previously assumed to require government design authority.
Its influence is visible in the Human Landing System awards, in CLPS, and in commercial station procurement, all of which use variations of the same structure. Whether those succeed will test whether the model generalises or whether Commercial Crew’s conditions were unusually favourable.
References
- NASA Commercial Crew Program documentation and certification records.
- NASA Office of Inspector General reports on Commercial Crew cost and schedule.
- Zapata, E. “An Assessment of Cost Improvements in the NASA COTS-CRS Program”, AIAA SPACE 2017.
- US Government Accountability Office reports on Commercial Crew.
- Boeing public financial disclosures on Starliner charges.