Errata for “Improved Baseline Productivity Analysis Technique” by Chien-Liang Lin and Hong-Ming Huang
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VIEW THE CORRECTED ARTICLEPublication: Journal of Construction Engineering and Management
Volume 136, Issue 9
The following corrections should be made to the original paper:Table 3. Daily Productivity and DEA Performance—Case Projecta
Table 4. Baseline Productivity Sets Derived from Different BP Methods
Table 5. Summary of Different BP Methods
1.
In Table 3, productivities for workdays 34 and 35 should not be considered DEA-classified baseline productivity, owing to the existence of slacks.
a.
Accordingly, in the old Table 4, the two figures (2.89 and 2.89) for workdays 34 and 35 (column 5) should be removed, and the eventually derived BP of DEA should be 1.95, not 2.10, as shown in the bottom of column 5.
b.
Based on the aforementioned corrections, the data in column 2 of Table 5 should be corrected accordingly.
2.
Four lines before and one line after Eq. (9) and in the notation list, “output excesses” should be changed to “output shortfalls” and “input shortfalls” should be corrected as “input excesses.”
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | (12) | (13) | (14) |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Conversion factor | 11.76 | 3.65 | 0.53 | 1 | 0.66 | Converted daily | DEA | Allslacks | |||||
Work-day | Work-hours | Penetrations(each) | Firedamper(each) | Branchduct(ft) | Feeder duct | ||||||||
Small | Large | Output | Prod. | Output oriented | |||||||||
(ft) | (ft) | (m) | (wh/m) | CCR | BCC | SEb | |||||||
1 | 40 | 4 | 0.0 | 0 | 0.0 | 0.0 | 47.0 | 14.3 | 2.79 | Yes | |||
2 | 40 | 0 | 1.2 | 30.6 | 0.0 | 0.0 | 20.6 | 6.3 | 6.36 | 0.28 | 0.38 | 0.73 | |
3 | 40 | 0 | 0.0 | 55.1 | 0.0 | 0.0 | 29.2 | 8.9 | 4.49 | 0.35 | 0.59 | 0.60 | |
4 | 40 | 0 | 0.0 | 86.3 | 0.0 | 0.0 | 45.7 | 13.9 | 2.89 | 0.55 | 0.92 | 0.60 | |
5 | 40 | 0 | 3.0 | 40 | 0.0 | 0.0 | 32.2 | 9.8 | 4.07 | 0.46 | 0.57 | 0.81 | |
6 | 24 | 0 | 0.0 | 67.5 | 0.0 | 0.0 | 35.8 | 10.9 | 2.20 | 0.72 | 0.72 | 1.00 | |
7 | 24 | 0 | 0.0 | 93.6 | 0.0 | 0.0 | 49.6 | 15.1 | 1.57 | Yes | |||
8 | 24 | 0 | 0.0 | 45.9 | 0.0 | 0.0 | 24.3 | 7.4 | 3.25 | 0.49 | 0.49 | 1.00 | |
9 | 24 | 0 | 1.6 | 23.3 | 0.0 | 0.0 | 18.2 | 5.5 | 4.33 | 0.43 | 0.80 | 0.54 | |
10 | 24 | 0 | 0.0 | 0 | 17.3 | 2.3 | 18.7 | 5.7 | 4.20 | 0.66 | 1.00 | 0.66 | |
11 | 24 | 0 | 0.0 | 27.2 | 4.5 | 1.5 | 19.9 | 6.1 | 3.97 | 0.37 | 0.95 | 0.39 | |
12 | 24 | 0 | 2.0 | 28.7 | 0.0 | 0.0 | 22.5 | 6.9 | 3.51 | 0.54 | 1.00 | 0.54 | |
13 | 40 | 0 | 0.0 | 41.7 | 0.0 | 3.0 | 24.1 | 7.3 | 5.45 | 0.33 | 0.48 | 0.68 | |
14 | 40 | 0 | 0.0 | 80.2 | 0.0 | 0.0 | 42.5 | 13.0 | 3.08 | 0.51 | 0.86 | 0.60 | |
15 | 40 | 0 | 0.0 | 54.7 | 5.1 | 0.0 | 34.1 | 10.4 | 3.84 | 0.38 | 0.63 | 0.61 | |
16 | 24 | 0 | 2.0 | 25.1 | 0.0 | 0.0 | 20.6 | 6.3 | 3.81 | 0.50 | 1.00 | 0.50 | |
17 | 24 | 0 | 0.0 | 90.9 | 6.8 | 0.0 | 54.9 | 16.7 | 1.44 | Yes | |||
18 | 24 | 0 | 1.4 | 16.3 | 1.5 | 1.5 | 16.2 | 5.0 | 4.85 | 0.39 | 1.00 | 0.39 | |
19 | 24 | 0 | 0.0 | 26.3 | 0.0 | 0.0 | 13.9 | 4.3 | 5.64 | 0.28 | 0.28 | 1.00 | |
20 | 24 | 0 | 2.0 | 58 | 0.0 | 0.0 | 38.0 | 11.6 | 2.07 | 0.85 | 1.00 | 0.85 | |
21 | 24 | 0 | 0.0 | 0 | 30.0 | 0.0 | 30.0 | 9.2 | 2.62 | Yes | |||
22 | 24 | 0 | 0.0 | 60 | 0.0 | 0.0 | 31.8 | 9.7 | 2.46 | 0.64 | 0.64 | 1.00 | |
23 | 40 | 0 | 0.0 | 24.3 | 22.3 | 12.0 | 43.1 | 13.2 | 3.05 | 0.70 | 0.79 | 0.89 | |
24 | 40 | 0 | 0.0 | 65.3 | 19.0 | 29.9 | 73.3 | 22.4 | 1.80 | Yes | |||
25 | 40 | 0 | 0.0 | 18.8 | 0.0 | 20.3 | 23.3 | 7.1 | 5.64 | 0.68 | 0.68 | 1.00 | |
26 | 40 | 0 | 0.0 | 47 | 11.3 | 20.7 | 49.9 | 15.2 | 2.62 | 0.70 | 0.71 | 0.99 | |
27 | 40 | 0 | 0.0 | 34.5 | 7.3 | 2.3 | 27.1 | 8.2 | 4.89 | 0.34 | 0.47 | 0.72 | |
28 | 40 | 0 | 0.0 | 39.6 | 5.4 | 23.6 | 42.0 | 12.8 | 3.12 | 0.79 | 0.79 | 1.00 | |
29 | 32 | 0 | 0.0 | 0 | 38.1 | 0.8 | 38.6 | 11.8 | 2.72 | 0.96 | 1.00 | 0.96 | |
30 | 40 | 0 | 0.0 | 11.9 | 35.2 | 0.0 | 41.5 | 12.7 | 3.15 | 0.76 | 1.00 | 0.76 | |
31 | 40 | 0 | 0.0 | 56.7 | 16.2 | 0.0 | 46.2 | 14.1 | 2.85 | 0.61 | 0.86 | 0.71 | |
32 | 40 | 0 | 0.0 | 33.9 | 0.0 | 0.0 | 18.0 | 5.5 | 7.31 | 0.22 | 0.36 | 0.60 | |
33 | 40 | 0 | 10.0 | 49.4 | 0.0 | 0.0 | 62.7 | 19.1 | 2.10 | Yes | |||
34c | 40 | 0 | 10.0 | 16.9 | 0.0 | 0.0 | 45.5 | 13.9 | 2.89 | 1.00 | 1.00 | 1.00 | No |
35c | 40 | 0 | 10.0 | 16.9 | 0.0 | 0.0 | 45.5 | 13.9 | 2.89 | 1.00 | 1.00 | 1.00 | No |
36 | 24 | 0 | 0.0 | 76.8 | 0.0 | 0.0 | 40.7 | 12.4 | 1.94 | 0.82 | 0.82 | 1.00 | |
37 | 24 | 0 | 0.0 | 49.5 | 0.0 | 0.0 | 26.2 | 8.0 | 2.99 | 0.53 | 0.53 | 1.00 | |
Total | 1,216 | 4 | 43.2 | 1,493 | 220 | 118 | 1,294 | 394 | 3.08 |
a
Boldface indicates baseline subset identified by DEA.
b
c
, so not fully CCR efficient
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) |
---|---|---|---|---|---|---|---|---|
Work-day | Work-hours | Dailyoutput(m) | Baseline productivity set | |||||
Thomas | DEA | K-means | Zink | Control chart | ||||
2 STD | 3 STD | |||||||
Iteration 4 | Iteration 1 | |||||||
1 | 40 | 14.3 | 2.79 | 2.79 | 2.79 | 2.79 | ||
2 | 40 | 6.3 | 6.36 | |||||
3 | 40 | 8.9 | 4.49 | 4.49 | ||||
4 | 40 | 13.9 | 2.89 | 2.89 | 2.89 | |||
5 | 40 | 9.8 | 4.07 | 4.07 | ||||
6 | 24 | 10.9 | 2.2 | 2.2 | 2.2 | |||
7 | 24 | 15.1 | 1.57 | 1.57 | 1.57 | 1.57 | 1.57 | |
8 | 24 | 7.4 | 3.25 | 3.25 | 3.25 | |||
9 | 24 | 5.5 | 4.33 | 4.33 | ||||
10 | 24 | 5.7 | 4.2 | 4.2 | ||||
11 | 24 | 6.1 | 3.97 | 3.97 | 3.97 | |||
12 | 24 | 6.9 | 3.51 | 3.51 | 3.51 | |||
13 | 40 | 7.3 | 5.45 | |||||
14 | 40 | 13.0 | 3.08 | 3.08 | 3.08 | |||
15 | 40 | 10.4 | 3.84 | 3.84 | 3.84 | |||
16 | 24 | 6.3 | 3.81 | 3.81 | 3.81 | |||
17 | 24 | 16.7 | 1.44 | 1.44 | 1.44 | 1.44 | 1.44 | |
18 | 24 | 5.0 | 4.85 | 4.85 | ||||
19 | 24 | 4.3 | 5.64 | |||||
20 | 24 | 11.6 | 2.07 | 2.07 | 2.07 | |||
21 | 24 | 9.2 | 2.62 | 2.62 | 2.62 | 2.62 | ||
22 | 24 | 9.7 | 2.46 | 2.46 | 2.46 | |||
23 | 40 | 13.2 | 3.05 | 3.05 | 3.05 | |||
24 | 40 | 22.4 | 1.80 | 1.80 | 1.80 | 1.80 | 1.80 | |
25 | 40 | 7.1 | 5.64 | |||||
26 | 40 | 15.2 | 2.62 | 2.62 | 2.62 | 2.62 | 2.62 | |
27 | 40 | 8.2 | 4.89 | 4.89 | 4.89 | |||
28 | 40 | 12.8 | 3.12 | 3.12 | 3.12 | 3.12 | ||
29 | 32 | 11.8 | 2.72 | 2.72 | 2.72 | 2.72 | ||
30 | 40 | 12.7 | 3.15 | 3.15 | 3.15 | 3.15 | ||
31 | 40 | 14.1 | 2.85 | 2.85 | 2.85 | 2.85 | ||
32 | 40 | 5.5 | 7.31 | |||||
33 | 40 | 19.1 | 2.10 | 2.10 | 2.10 | 2.10 | 2.10 | |
34 | 40 | 13.9 | 2.89 | 2.89 | 2.89 | |||
35 | 40 | 13.9 | 2.89 | 2.89 | 2.89 | |||
36 | 24 | 12.4 | 1.94 | 1.94 | 1.94 | |||
37 | 24 | 8.0 | 2.99 | 2.99 | 2.99 | |||
BP | 1.80 | 1.95 | 2.75 | 3.10 | 3.08 | 3.48 |
(1) | (2) | (3) | (4) | (5) | (6) | |
---|---|---|---|---|---|---|
Thomas | DEA | K-means | Zink | Control chart | ||
2 STD | 3 STD | |||||
(1) Number of BP days | 5 | 6 | 26 | 6 | 32 | 37 |
(%) | 14 | 16 | 70 | 16 | 86 | 100 |
(3) # of BP days between days 7 and 26 | 4 | 4 | 14 | 1 | 17 | 20 |
(%) | 80 | 67 | 54 | 17 | 53 | 54 |
(5) BP (wh/m) | 1.8 | 1.95 | 2.75 | 3.10 | 3.08 | 3.48 |
a (%) | 58 | 63 | 89 | 101 | 100 | 113 |
(7) Rank | 1 | 2 | 3 | 5 | 4 | 6 |
a
(wh/m)
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© 2010 ASCE.
History
Received: Feb 20, 2010
Accepted: Apr 19, 2010
Published online: Aug 13, 2010
Published in print: Sep 2010
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