Prediction of Client Support on Contractor Performance as a Critical Success Factor

The aim of this study was to assess the influence of client support on performance of contractors within the road construction industry in Kenya. The study adopted descriptive survey research design and correlation research design. The target population was 156 selected from road contractors, engineers working in road authorities, technical auditors and consultants in the road sector. Stratified and proportionate sampling techniques were employed in coming up with a sample size of 62 respondents drawn from a target population of 156. From the simple linear regression conducted, the findings revealed that client support influences the performance of contractors in the road construction sector. Thus, we recommend that client support is highly needed to avoid issues such as delayed payment that would adversely affect performance of contractors in the road construction industry. This will subsequently lead to timely completion of roads, achieving cost effective and quality road projects.


Introduction
The responsibility of achieving success in the implementation of a construction project largely depends on the contractor's performance. However, delays in project completion and poor performance in the construction industry have been experienced in many projects globally and more especially in the developing countries [1] [2] [3] [4] [5].
In Malaysia, 17.3% of construction projects experience more than three months delay and some of them are abandoned [3]. The factors causing delays include: labour shortage, financial difficulties, construction mistakes and defec-How to cite this paper: Matu, J., Gatotoh to the design. On the part of the client or the project owner, delayed payments followed by delivery of construction site influenced contractor performance. A related but separate survey in Ghana seems to confirm this view, where financial difficulties were ranked among the top three most probable effects of late payments to contractors [4].
In Kenya, implementation of projects within budget and time stands at 20.8% imputing that 79.2% projects do not meet this criteria [7]. This is attributed to weak project design, insufficient implementing capacity, weak project management and political interference. Therefore, factors influencing performance of contractors are very critical to any construction firm. Xiao and Proverbs stated that contractor performance can be realized when clients attempt to reduce project's design variations in the course of construction [8].
The constructions industry, being complex, comprises various parties as project client (owner), project contractor, project consultant, project stakeholder, and the regulator [9]. The role of client is to capture various challenges in construction projects and also interact and communicate with diverse key stakeholders for the success of construction of projects [10]. For example, in Kenya, the main road agencies are Kenya National Highway Authority (KeNHA), Kenya Urban Roads Authority (KURA) and Kenya Rural Roads Authority (KeRRA) mandated with construction and maintenance of road projects as clients. It is expected they support the road contractors in carrying out tasks related to design review and provision of project funds. Chigangacha and Haupt argue that clients in private sector tend to get involved in projects than their counterparts in public sector [11].
They further state that client involvement is predominant in pre-construction and post-construction phases.
Considering that a number of studies have presented issues of project implementation and performance, none has identified and addressed the issue of client support. This study was therefore guided by null hypothesis (H 0 ) that there is no relationship between client support and contractor performance.

Literature Review
Literature shows that delay in project completion has been a subject of concern to various researchers for decades. Since delay is directly associated with cost and time overrun, thus it is a matter of concern for stakeholders in the construction sector. Some of the studies in various contexts are covered in this section. Journal of Building Construction and Planning Research

Gap in Contractor Performance
Different contexts have produced related challenges for project completion with small contextual differences. A study by Thorat, et al. in India, determined the top ten causes of delay in construction projects [12] shortage in material g) labour supply h) equipment availability and failure i) lack of communication j) mistakes and rework. As already aforementioned, the current study will focus on client support and contractor performance. Some of the key performance factors (KPIs) relating to project performance and not contractor performance are cost, time, quality, safety and health [14].
A study by Alinaitwe on assessment of clients' performance in having an efficient building process in Uganda revealed that factors such as delayed payment by clients, lack of support for training the workers and poor or irregular attendance of meetings affected contractors' performance [15]. Similarly, Simaya and Maro noted that cost, quality and time remain important aspects that need to be considered during project execution phase to contribute towards performance [16]. Mushori, Rambo and Wafula revealed performance of road construction infrastructure projects can as well be measured in terms of quality of the completed projects [17].

Client Support
Client support is by show of the role assumed to ensure timely completion and cost effectiveness of the road projects hence contributing to a positive image on contractor's performance. Jegtap and Kamble study on construction firms affirmed the significance of demarcating roles of client and contractor roles within the construction supply chain so as to enhance project performance [18]. Alinaitwe noted that the success of project depends as much on the client as it does on the consultants and contractors [15]. Client support include but is not limited to; budget allocation and prompt payments of interim progress payments [19] [20], provision of accurate project designs and approvals [21] [22], prompt issue of instructions to commence the construction work [21], early land acquisition of areas required for the construction of roads [23], project supervision to ensure quality including achievement of value for money and timely taking over inspec-Journal of Building Construction and Planning Research tion and certification of works once project is completed [23] [24].
One of the most important client support role is the payment for work done by a contractor in a project initiated by the client. Byaruhanga and Basheka observed that delay of contractors' payment affects timelines in delivery of services [25]. Ramachandra argues that the performance of the participants involved and the product output is dependent on the promptness and regularity of payment [19]. He further suggests that failure to pay in the construction industry may be put in three categories; delay in paying one or more certificates, reduction in value of certificates or invoices, and not paying at all. Payments in the construction industry are seen as monetary consideration for the contractors' performance for work done. Tran and Carmichael concluded that late and intermittent payments or non-payments or both can critically affect performance of contractors [26]. Several studies have established that the character and the diverse types of contractual payments that might be delayed or defaulted by the employer may additionally be classified as interim, stage or milestone, advance payments, payment of retention monies and final payments [4] [19] [27] [28] [29]. Governments or owners of projects should allocate adequate budgets to a project to enable its completion since it cannot continue with inadequate financing, and would affect performance of contractors to meet planned targets [20].
Another key support area is accurate project design and approval. This is critical in project execution as it eliminates the need to vary the contract. The government is also responsible for approval of the project which facilitates contractor performance. In a study by Arshi and El-Sayegh, the perspective of contractors and consultants was analysed to rank the causes of delays based on their Relative Importance Index. Contractors and consultants were in agreement on the most significant causes of delays [21]. It was noted 50% of UAE construction projects face delay challenges and untimely completions of projects. Factors associated with delays are drawings approval, poor or inadequate planning and decision making process taking longer by the project owner. A qualitative study by Sperling et al. found that project success was a result of effective communication, not forgetting consultation and sharing of information between the client, designer and constructor were vital to project success [30].
Additionally, there is a need for contractors to be given maximum support in the possession of land for the construction without any encumbrances. This means that the required land must be acquired at the early stages of the project cycle. In India, megaprojects suffer from both time and cost overruns primarily because of environmental and land acquisition controversies [23].
Trigunarsyah and Al-Solaiman stated that low client involvement can have serious negative impact on the overall projects' outcomes particularly completion time and project quality [31]. It is however argued that client-consultant coordination has a significant effect on performance through goal congruence and building trust [32]. Gunduz and Almuajebh listed client related factors for sustainable construction project management. These include [33]: client's expe-Journal of Building Construction and Planning Research rience in the construction industry, mechanism for financial payments and finally client's influence or representative. Late payment is pointed out by Simaya and Maro as a challenge that faces local government authorities hence not being able to achieve value for money [34].
A study by Halwatura and Pathiranage revealed that locally based road construction projects in Sri Lanka experience between 56% and 88% of average time overrun compared to planned project duration as a result of financial problems on the part of the owner (client) and the contractor [35]. The findings resonate with Mushori et al. who found that road performance is correlated with financial ability [17]. All these, however, cannot be achieved without the support or involvement of the client (owner of the road projects).The adduced evidence on the importance of client role in supporting contractor performance is not empirically supported hence the current study that aims to test the relationship between these two variables, client support and contractor performance in road construction projects.

Stakeholders Theory
This study is based on stakeholder's theory which, as a field of research, has tended to focus on planning and managing the complex array of activities required for delivering a construction project, such as a road or building [36]. The theory has its genesis in strategic organization, and has been applied in several areas of enquiry as well in corporate social responsibility [37], including on construction project organization lately [38].
Construction business, as an area of study, tends to focus on scheduling and organizing the multifaceted assortment of activities necessary to complete a construction project. Being able to manage construction stakeholder's hopes and concerns is a critical skill for managers of construction projects. Failure to tackle hopes and concerns of stakeholders in a construction project has resulted in innumerable failure of projects [38], principally for the reason that stakeholders in construction have a tendency to obtain resources and ability to impede construction. Meeting the expectation of stakeholder is critical to successful execution of construction projects. Stakeholders include owners of project, consultants, subcontractors, suppliers, funding bodies, users, owners, employees and project managers. As a consequence, a vigorous construction organization literature has developed on how to recognize and manage stakeholder welfare and interactions. Stakeholder theory is preferred in this study to aid in establishing important factors that have influence contractor performance within the road construction industry in Kenya.

Methodology
This study employed a descriptive survey research design and correlation research design. The design was employed to determine the relationship between the predictor variable and the outcome variable [39]. Study population total was Journal of Building Construction and Planning Research 156 representing 51 road contractors, 40 consulting engineers, 60 engineers from road authorities and 5 technical auditors participating in road construction in Kenya. The road authority engineers were sampled from the following agencies: Kenya National Highway Authority (KeNHA), Kenya Urban Roads Authority (KURA) and Kenya Rural Roads Authority (KeRRA). In this study, stratified sampling was applied for grouping the subjects into four strata, thereby using proportionate sampling to pick sample size from each stratum. Out of target population of 156, a sample of 62 was obtained, representing 40%. According to Gay and Airasian a sample size between 10% -40% is sufficient for analysis [40].
The sampling techniques were applied so as to obtain a representative sample because the study population did not constitute a homogeneous group. The data was collected using self-administered questionnaires through simple random sampling technique. The Cronhach's alpha for client support was α = 0.748 above 0.7 thus meeting the threshold by Gliem and Gliem that a value of 0.7 is acceptable reliability coefficient [41].
A total of 51 questionnaires were filled and returned representing 82.3% of the total number of questionnaire distributed having surpassed a pass mark of 70% exceptional [42].

Results and Discussions
The results of the study are presented in three parts; contractor performance, client support, skilled manpower and training. The results are presented using means, standard deviation, and correlation and regression analysis.

Contractor Performance
The study sought to establish how contractor performance is influenced by client support. The results are shown in Table 1. Table 1 show that most of the respondents strongly agreed that the following factors hinder contractor performance in terms of

Client Support and Contractor Performance
The study sought to establish the extent to which client support influence construction of roads projects. The results are shown in Table 2.
Results presented in Table 2 show that majority of the respondents strongly

Inferential Analysis
The inferential analysis was performed by use correlation analysis (Table 3) and regression analysis (Table 4).

Correlation Analysis
Correlation analysis was performed using Karl Pearson's Product Moment to  establish the relationship between the predictor and the outcome variables ( Table 3).
The results in Table 3 show the relationship of client support (CS)to be significant positive and moderate strong with contractor performance (CP) given coefficient (R) for CS is 0.287, whereas the p-values are 0.041 (CS)less than 0.05 level of significance. This implies that the predictor CS has some influence on contractor performance. The findings are in line with Alinaitwe that client support is necessary for project success [15]. The findings are also in line with Bitamba and An who opined that contractor performance is influenced by client management [6].

Regression Analysis
The study employed simple linear regression to test the study hypothesis [43], which was stated in null (H o ) form (Table 4).
H 0 : There is no relationship between client support and contractor performance.
H 1 : There is a relationship between client support and contractor performance.
The regression equation used was as follows:   The findings provide evidence that client support greatly influence contractor performance. In this respect, the null (H 0 ) hypothesis was rejected and alternate (H 1 ) hypothesis accepted that, there is a relationship between client support and contractor performance. The study findings that CS is good predictor of contractor performance is in line with former studies conducted in the other countries [5] [20] [21].

Conclusions
The study makes the following conclusions: • That availability of client support enhances the performance of contractors in the road construction sector. Prompt payments and approvals is considered very crucial in facilitating timely project completion and • That insufficient support is likely to cause project costs overrun, disputes, arbitration costs, litigation and project abandonment.

Recommendations
The study makes the following recommendations: • There is need for the government and other key players in the construction sector to develop clear policies on client involvement and support based on Journal of Building Construction and Planning Research revelation that stakeholder/client support enhanced the implementation of road construction projects.
• In order to alleviate problems associated with delayed payments, there should be effective funding of project by the client to avoid unnecessary time overruns which eventually lead to cost overruns and delayed completion of road construction projects which have a bearing on poor performance of road contractors.
• Client in conjunction with the consultants and contractors should endeavor to work together to build the capacity of the hired team for successful project implementation. Where possible, on-site training should be offered so that quality products are delivered. Besides, such trainings would ensure minimum wastage of materials by the project team thus controlling costs.