Breakdown of lead time at which proficiency test materials were delivered
| Section | Lead time (hr) |
|---|---|
| Section 1 | 27 hours after shipping (after 1 day, before 6 PM) |
| Section 2 | 27.01?41.00 (after 2 days, before 8 AM) |
| Section 3 | 41.01?51.00 (after 2 days, before 6 PM) |
| Section 4 | >51.01 (after 2 days, after 6 PM) |