| A prognostics and health management roadmap for information and electronics-rich systems Recent countries visiting this post |  |
 | 3 | United States |
 | 2 | China |
 | 1 |
| A prognostics and health management roadmap for information and electronics-rich systems Recent countries visiting this post | |
| 3 | United States |
| 2 | China |
| 1 |