# U.S. Postal Service: Action Needed to Improve Credibility of Cost Assumptions for Next Generation Delivery Vehicles
> **GAO Report** · 2023-04-20 · `gao-23-106677`
## Report
- **GAO ID:** gao-23-106677
- **Type:** Report
- **Published:** 2023-04-20
## Source
- [GAO product page](https://www.gao.gov/products/gao-23-106677)
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