Barrier | Mann- Whitney U | Wilcox on W | Z | Asymptotic Significance (2-tailed) | |
1 | Lack of Timely Information The process is not automated hence cannot facilitate real-time progress measurement and it is also time-consuming. | 99 | 424 | −5.597 | 0.000 |
2 | Laborious Data Gathering Manual data collection and extraction, as well as tedious calculations, make the process operose, inaccurate and steep. | 360 | 685 | −1.536 | 0.124 |
3 | Variable Quality of Data Different units of measurement employed impacting on duration and accuracy of procession. | 421.5 | 1051.5 | −0.406 | 0.684 |
4 | Fixation on Time Data Using time data only in computing progress. | 297.5 | 622.5 | −2.281 | 0.023 |
5 | Fixation on Cost Data Using cost data only in computing progress. | 281 | 606 | −2.550 | 0.011 |
6 | Intricate Measurement Reports Difficulty in generating structured work breakdown to facilitate activity measurement and easy visualization of progress monitoring reports. | 429.5 | 754.5 | −0.148 | 0.882 |
7 | Reliance on Supervisor’s Judgement Dependence on the opinion of supervisors not grounded on firm data. | 4225 | 747.5 | −0.433 | 0.665 |
8 | Quality Integration Constraint Difficulty in integrating cost, time and scope of work (quality) into the progress measurement. | 135 | 765 | −4.864 | 0.000 |
9 | Generic and Non-systematic Approach Method of progress measurement is unspecified in contract documents. | 374.5 | 699.5 | −1.523 | 0.128 |
10 | Deficient Method Statement Difficulties in analyzing causes of deviations. | 172 | 497 | −4.709 | 0.000 |
11 | Frequent Variation in Work Changing nature of work necessitating corrective measures. | 332 | 657 | −2.198 | 0.028 |
12 | Contentious Claims Non-defined work scope and responsibilities, and poor documentations. | 140 | 770 | −4.740 | 0.000 |
13 | Unrealistic Planning Inadequate pre-contract planning resulting in increased scope of effort and extensive as-planned data. | 220 | 545 | −3.791 | 0.000 |
14 | Unforeseen Site Conditions The difficulty in taking physical measurement under inclement weather. | 237 | 562 | −3.268 | 0.001 |
15 | Extension of Time Measurements related to time are muddled when time changes. | 430.5 | 1060.5 | −0.119 | 0.905 |
16 | Delays and Disruptions Progress measurement becomes distorted whenever work is interrupted and prolonged reports also delay decision making process. | 329.5 | 959.5 | −1.702 | 0.089 |