# X-33 Cost Estimating Process
> **NASA OIG audit** · 1999-09-24
## Report
- **Type:** audit
- **Date:** 1999-09-24
- **Modified:** 2024-11-22
## Summary

September 24, 1999

## Source
- [NASA OIG report page](https://oig.nasa.gov/office-of-inspector-general-oig/ig-99-052/)
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