Cost and time performance of traditional-, direct labour- and management-procured public projects in Ondo State, Nigeria
, and | Dec 29, 2017
About this article
Article Category: Research Article
Published Online: Dec 29, 2017
Page range: 1593 - 1603
Received: Sep 01, 2017
Accepted: Nov 14, 2017
DOI: https://doi.org/10.1515/otmcj-2016-0022
Keywords
© 2017 Douglas Omoregie Aghimien et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Cost and time analysis for traditionally procured public projects
| 1 | Educational building | 45.0 | 39.0 | 6.0 | 15.4 | 45 | 30 | 15 | 50.0 |
| 2 | Educational building | 18.0 | 11.5 | 6.5 | 56.5 | 28 | 24 | 4 | 16.7 |
| 3 | Social building | 600.0 | 600.0 | 0.0 | 0.0 | 96 | 76 | 20 | 26.3 |
| 4 | Residential | 116.0 | 93.0 | 23.0 | 24.7 | 46 | 36 | 10 | 27.8 |
| 5 | Residential | 2.3 | 2.3 | 0.0 | 0.0 | 10 | 10 | 0 | 0.0 |
| 6 | Residential | 5.7 | 5.7 | 0.0 | 0.0 | 12 | 12 | 0 | 0.0 |
| 7 | Residential | 5.6 | 5.6 | 0.0 | 0.0 | 15 | 15 | 0 | 0.0 |
| 8 | Offices | 37.5 | 33.0 | 4.5 | 13.6 | 34 | 30 | 4 | 13.3 |
| 9 | Educational building | 501.3 | 395.5 | 105.7 | 26.7 | 48 | 35 | 13 | 37.1 |
| 10 | Educational building | 150.0 | 150.0 | 0.0 | 0.0 | 72 | 52 | 20 | 38.5 |
| 11 | Residential | 13.5 | 13.5 | 0.0 | 0.0 | 32 | 15 | 17 | 113.3 |
| 12 | Offices | 55.4 | 50.7 | 4.7 | 9.3 | 36 | 24 | 12 | 50.0 |
Factors influencing the choice of procurement method used in public project delivery
| Price competition - need to achieve value for money and public accountability | 4.27 | 1 | 3.75 | 4 | 3.40 | 2 | 4.27 | 1 | 3.98 | 1 | 1.622 | 0.199 |
| Speed - in all phases of the project | 4.13 | 2 | 3.50 | 10 | 3.60 | 1 | 4.00 | 2 | 3.86 | 2 | 0.654 | 0.585 |
| Time certainty - ability to complete project within the agreed duration | 4.07 | 4 | 3.86 | 3 | 3.10 | 7 | 4.00 | 2 | 3.79 | 3 | 1.869 | 0.151 |
| Complexity of the project | 4.13 | 2 | 3.63 | 7 | 3.20 | 6 | 3.91 | 4 | 3.77 | 4 | 2.071 | 0.119 |
| Flexibility - ability to accommodate changes during design and construction phases | 3.86 | 7 | 4.00 | 1 | 3.22 | 5 | 3.64 | 8 | 3.69 | 5 | 1.343 | 0.275 |
| Quality - the need to fulfil client’s expectation of essential project characteristics | 3.93 | 6 | 3.71 | 6 | 3.10 | 7 | 3.73 | 6 | 3.64 | 6 | 1.809 | 0.162 |
| Familiarity - based on previous experience | 3.80 | 8 | 3.43 | 12 | 3.33 | 3 | 3.73 | 6 | 3.62 | 7 | 0.561 | 0.644 |
| Simplicity - in terms of activities, process and procedure | 4.07 | 4 | 3.57 | 9 | 3.10 | 7 | 3.36 | 12 | 3.58 | 8 | 2.430 | 0.080 |
| Price certainty - the ability to keep expenditure within budgeted estimate | 3.80 | 8 | 3.50 | 10 | 2.90 | 10 | 3.91 | 4 | 3.57 | 9 | 1.822 | 0.159 |
| Government policy - on using a particular procurement route | 3.60 | 10 | 3.63 | 7 | 2.90 | 10 | 3.64 | 8 | 3.45 | 10 | 1.366 | 0.267 |
| Dispute resolution and arbitration | 3.36 | 12 | 4.00 | 1 | 3.33 | 3 | 2.91 | 13 | 3.34 | 11 | 2.406 | 0.083 |
| Responsibility - the need to be involved in and to be kept informed about the project through its life | 3.40 | 11 | 3.75 | 5 | 2.80 | 13 | 3.40 | 11 | 3.33 | 12 | 1.105 | 0.359 |
| Risk allocation - knowledge on how and to what degree uncertainties/risks have been passed to or shared among parties | 3.33 | 13 | 3.14 | 13 | 2.90 | 10 | 3.44 | 10 | 3.22 | 13 | 0.906 | 0.448 |
Summary of the cost performance of public building projects, analyzed using the paired-samples t-test
| Traditional | 12.5 | 12.2 | 30.1 | 8.7 | 1.44 | 11 | 0.177 |
| Direct labour | 1.0 | 8.8 | 2.9 | 0.9 | 1.13 | 11 | 0.281 |
| Management procurement | 115.2 | 8.8 | 382.6 | 110.5 | 1.04 | 11 | 0.319 |
Summary of the time performance of public building projects using the paired-samples t-test
| Traditional | 10 | 31.1 | 8 | 2 | 4.296 | 11 | 0.001 |
| Direct labour | 4 | 24.7 | 4 | 1 | 2.974 | 11 | 0.013 |
| Management procurement | 14 | 47.4 | 17 | 5 | 2.845 | 11 | 0.016 |
Cost and time analysis for management-procured public projects
| 1 | Educational building | 67.0 | 63.0 | 4.0 | 6.3 | 72 | 67 | 5 | 7.5 |
| 2 | Social building | 3,213.0 | 1,883.0 | 1.3 | 70.6 | 6 | 6 | 0 | 0.0 |
| 3 | Educational building | 29.6 | 29.6 | 0.0 | 0.0 | 24 | 24 | 0 | 0.0 |
| 4 | Educational building | 110.0 | 110.0 | 0.0 | 0.0 | 32 | 20 | 12 | 60.0 |
| 5 | Social building | 69.4 | 69.4 | 0.0 | 0.0 | 53 | 30 | 23 | 76.7 |
| 6 | Social building | 121.1 | 121.1 | 0.0 | 0.0 | 30 | 21 | 9 | 42.9 |
| 7 | Health centre | 250.0 | 217.0 | 33.0 | 15.2 | 32 | 21 | 11 | 52.4 |
| 8 | Health centre | 172.7 | 160.2 | 12.4 | 7.8 | 32 | 24 | 8 | 33.3 |
| 9 | Educational building | 158.5 | 158.4 | 98.2 | 0.1 | 114 | 52 | 62 | 119.2 |
| 10 | Social building | 54.0 | 51.1 | 2.9 | 5.7 | 24 | 24 | 0 | 0.0 |
| 11 | Residential | 69.7 | 69.7 | 0.0 | 0.0 | 42 | 20 | 22 | 110.0 |
| 12 | Residential | 245.0 | 245.0 | 0.0 | 0.0 | 40 | 24 | 16 | 66.7 |
Cost and time analysis for direct labour-procured public projects
| 1 | Offices | 56.0 | 46.0 | 10.0 | 21.7 | 32 | 24 | 8 | 33.3 |
| 2 | Educational building | 4.5 | 4.5 | 0.0 | 0.0 | 4 | 4 | 0 | 0.0 |
| 3 | Social building (ren.) | 1.5 | 1.0 | 0.5 | 50.0 | 4 | 4 | 0 | 0.0 |
| 4 | Utility building | 4.5 | 4.5 | 0.0 | 0.0 | 6 | 6 | 0 | 0.0 |
| 5 | Health care centre | 6.0 | 5.0 | 1.0 | 20.0 | 32 | 20 | 12 | 60.0 |
| 6 | Health care centre | 5.0 | 5.0 | 0.0 | 0.0 | 6 | 4 | 2 | 50.0 |
| 7 | Educational building | 7.1 | 7.1 | 0.0 | 0.0 | 5 | 4 | 1 | 25.0 |
| 8 | Social building (ren.) | 10.5 | 10.0 | 0.5 | 5.0 | 32 | 24 | 8 | 33.3 |
| 9 | Offices | 830.0 | 830.0 | 0.0 | 0.0 | 32 | 24 | 8 | 33.3 |
| 10 | Social building (ren.) | 10.0 | 8.5 | 1.5 | 17.6 | 28 | 24 | 4 | 16.7 |
| 11 | Residential | 28.2 | 30.0 | −1.8 | −6.0 | 17 | 18 | −1 | −5.6 |
| 12 | Educational building | 4.4 | 4.5 | −0.1 | −2.2 | 6 | 4 | 2 | 50.0 |