Research Article
Using the Laney p’ Control Chart for Monitoring COVID-19 Cases in Jordan
Table 3
Comparison between tests 1 and 3 in detecting process change.
| | Direction | Single stage | Multistage | Laney p’ | EWMA | Multistage | Test 1 | Test 3 | Test 3 |
| 1 | Downward | PW 52–20 | PW 52–20 | | PW 51–20 | | 2 | Upward | PW 11–21 | PW 10–21 | | PW 10–21 | | PW 7–21 | PW 5–21 | | | | 3 | Downward | PW 19–21 | | PW 17–21 | PW 19–21 | | 4 | Upward | | | | | PW 30–21 test 1 | 5 | Upward | PW 46–21 | PW 43–21 | PW 37–21 | PW 49–21 | PW 40–21 | 6 | Downward | PW 52–21 | | | | | 7 | Upward | PW 3–22 | PW 6–22 | | PW 3–22 | PW 4–22 |
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test 3 variant, test did not trigger. |