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