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The results of the Cronbach's Alpha reliability test for the seven categories of the causes of delay.
| Factors | Numbers of questions | Cronbach's alpha | Internal consistency |
|---|---|---|---|
| Owner | 12 | 0.827 | Excellent |
| Contractor | 11 | 0.813 | Excellent |
| Consultant | 8 | 0.720 | Good |
| Labor | 4 | 0.550 | Satisfactory |
| Material | 6 | 0.694 | Satisfactory |
| Equipment | 4 | 0.737 | Good |
| External Factors | 6 | 0.730 | Good |
