Influence of Building Information Modelling (BIM) on Engineering Contract Management in Nairobi, Kenya

Building Information Modelling (BIM) is a technology and a process that has brought changes in the construction’s traditional procurement system. Kenya lacks contractual guidelines on implementation of BIM; this makes the adoption of BIM slow and difficult. Previous research has identified a gap in contractual relationships, roles and resulting risks. The objectives of this study were to investigate BIM adoption in Nairobi and to investigate the influence of BIM on Engineering Contract Management (ECM) in Nairobi Kenya. The survey research was a descriptive study with 175 responsive questionnaires. Respondents comprised of Civil Engineers, Construction Project Managers, Architects, Quantity Surveyors, Contractors and Facility Managers. Data was collected through self-administered questionnaire and in-depth interview. Descriptive analytics, correlation and Exploratory factor analysis methods were used to analyse quantitative data. Qualitative data was analysed thematically. It emerged that adoption level was at 56.6% and shallow understanding of BIM capabilities remains to be a barrier to its adoption and implementation. It also emerged that BIM improves ECM; when time, cost, quality, collaboration and return on investment improve, ECM becomes easier. Latent factors found in BIM and ECM relationship were Legal Implications, awareness and knowledge, efficiency, versatility, mandate and leadership, and competitiveness. Further, the study found out that BIM influence on ECM demands for establishment of standards,


Introduction
One of the challenges in the construction industry is lack of effective collaboration which has contributed to poor quality delivery, time, and cost overruns in the lifecycle of a project. The BIM system gives the solution to these challenges caused by the Traditional procurement system. However, Kenya lacks a legal framework for BIM implementation, more so due to its collaborative nature that is changing relationships, roles, and responsibilities. The Kenyan industry lacks a formula, on how to handle these changes, how to use BIM, how to handle legal issues and how to handle contract management issues. The objectives of the study were to investigate BIM adoption, and to investigate the influence of BIM on engineering contract management (ECM) in Nairobi, Kenya.
The purpose of this survey study was to investigate how contract management has been affected by BIM which is relatively a new technology and whose adoption is ongoing, and whether it requires new systems and structures to be formed for maximum effectiveness and efficiency. The study facilitated understanding of the current standing of legal and contractual maturity of BIM. It was hoped the findings will stimulate the technological and legal fraternities to sufficiently deliberate the contractual uncertainties to facilitate a smoother uptake of BIM in the industry.
Research on BIM adoption, BIM's legal implications and contractual context for BIM has extensively been carried out in developed countries, the findings can be applied to most country scenarios. However, Bui et al., (2016) recommend comprehensive country specific research to be carried out in developing countries to address challenges being faced from the point of view of those countries.

What BIM Is
BIM is defined as a digital representation of the physical and functional characteristics of a facility, BIM is a shared knowledge resource for information about a facility, forming a reliable basis for decisions during its (facility) life-cycle; defined as existing from earliest conception to demolition [1]. Having several collaborators in the lifecycle of a project, makes management of information paramount [2]. BIM is not a software as has been the common misconception, rather, a Software supporting BIM should provide openness, interoperability, functionality, accuracy of data, expandability, time management, clash detection, cost estimation and facility management [3]. Building Information Modelling (BIM) is considered as a major paradigm shift after computer-aided design (CAD) by majority professionals and academic researchers [4]. Being a new technology, BIM system is a potential legal risk [5], that require contractual guidelines because new technologies affect the existing systems and structures, hence demanding for new laws and policy [6] to consolidate interrelationships and holistically, contract management [2].

Factors Guiding Adoption of BIM
BIM is a tool used for lifecycle management of information [9], with the advantage of digital storing [10]. It promotes process cooperation, collaborative efforts with lifecycle seamless flow of information [11] [12]. It provides 3D visualization [13], with real-time characteristics that allow revision of drawings at any stage of construction [14]. Ability to cooperate with the entire team, including the contractor and facility manager who traditionally were late entrants [15]. Return on investment (ROI) has guided companies to implement BIM after studying projects done with BIM [16].
Benefits of BIM towards an effective ECM include, reduced delivery time, reduced project cost [16] [17] [18], resource saving, better coordination, detection of clashes, better time management [16] [18], improved profitability and customer-client relationship [2]. BIM makes decision management easier [19] and better project management [4]. It further enables effective risk management [15], conflict management [20], sustainability management and energy analysis which are all addressed collaboratively with interactive feedback on design decisions and consequences [9] [10].
Some professionals are more inclined to BIM more than others, for instance, Architects are taking the lead in BIM, but, Civil Engineers to have a lot to benefit from it, by using it on civil and infrastructure projects [14]. In Kenya, the private industry is leading in adoption, but it is also limited by the Public procurement Act which mainly favours the traditional procurement system. World Journal of Engineering and Technology of care and professional negligence; Intellectual Property Rights; professional liability; claims and disputes; BIM cost compensation; additional project insurance; collaborative working and new roles; software, data security and interoperability; admissibility of electronic-based documents; legal validation of design; legislation and judicial precedence [22] [23] [24].
Developing countries such as Kenya are generally struggling with lack of BIM awareness, lack of standard, little or no government support, unclear legal status of BIM, lack of skills, limited financial, unclear benefits of BIM [25], software, hardware and internet issues [26]. In Kenya, the private sector is leading adoption, though at a slow pace [27] [28].
The Kenyan Procurement Act may be a major legal impediment. The Public Procurement and Asset Disposal Act 2016 outlines that in case of conflict and inconsistencies with other standard documents, the Act is set to prevail, the only exception being where procurement of professional services is governed by an Act of Parliament.

Methodology
This was a descriptive study, through questionnaire survey and in-depth interview. Self-administered questionnaires with both structured and unstructured questions were used to collect data. In-depth interviews with knowledgeable persons were carried out using a pre-drafted interview guide. The research was done in Nairobi Kenya and the respondents were drawn from consultants in the construction industry, they included Civil Engineers, Construction Project Managers, Architects, Quantity Surveyors, Mechanical Engineers, Electrical Engineers, Contractors, and Facility Managers.
Respondents' selection was through stratified random sampling, but with a prerequisite of, awareness of BIM regardless of whether they had used it or adopted it. This measure was to help avoid training respondents who had never heard of BIM. Out of the 252 questionnaires distributed, 175 were completed and returned which accounted for 69% return rate. Considering that follow-up reminders were made resulting in improved return rate, there however, were respondents who still did not return their questionnaires, some cited that though they had heard of BIM, their competency could not afford them confidence to complete the questionnaire.
Knowledgeable persons on BIM subject were required for the in-depth interview, and therefore, Snowball sampling was used; 8 interviews were successfully conducted. The interview stopped at 8 respondents because saturation point had been reached [29]. Both the quantitative and qualitative data was cleaned, coded and analysed quantitatively and thematically respectively.

Results
The primary target of respondents comprised of eight groups but during data collection a third group emerged of 2 combined areas of practice namely, 0.6% Respondents were also asked the stages of BIM they were in. 29.1% were in stage 0, 28.6% were in stage 1, 29.7% were in stage 2, and 12.6% were in stage 3.

Reliability Test of the Likert Scale Items
A reliability analysis to check internal consistency of the questionnaire's 75 Likert scale items was carried out; it was found to be excellent at a Cronbach's alpha of 0.963.

Correlation for BIM and ECM
A correlation analysis was carried out using Pearson correlation (r) to examine the relationship between the independent variable BIM and dependent variable  Table 2. Table 3 shows the correlation when BIM variables were combined to form one variable, BIM is significant and positively correlated to ECM, r (173) = 0.493, p < 0.01; When BIM improves ECM also improves in terms of time saving, cost reduction, quality improvement, better collaboration hence a positive ROI.

Underlying Factors of Influence of BIM on ECM
Exploratory factor analysis (EFA) was carried out with principal component analysis as the extraction method the primary purpose being to compute the latent factors of influence of BIM on ECM. This analysis used EFA because the number and nature of expected factors were unknown [30]. 5-point Likert scale was used to measure the 75 variables. The variables had a significant positive correlation at p < 0.01 and p < 0.05.
Kaiser-Meyer-Olkin (KMO) measure of sampling adequacy was found to be okay, at KMO = 0.872, Bartlett's test of sphericity was significant at χ 2 = 9575.289, p < 0.001. The diagonals of the anti-image correlation matrix were also over 0.5. Communalities were above 0.5 hence confirming that each item shared some common variance with other items. This proved that Factor analysis was a suitable method of analysis.   The web engine parallel analysis calculates Eigenvalues based on parameters provided by the researcher, the result is compared with eigenvalue from computer generated data set, factors retained have a higher eigenvalue than that provided by corresponding eigenvalues from the engine [31]. See Table 5 for the summary.
The decision was made to conduct the test again with a preset fixed number of 7 factors. This resulted in 54.4% cumulative variance being accounted for by preset factors. By Oblimin rotation the correlation of the 7 factors was below 0.5 implying they were not highly correlated, hence the need to change from oblique rotation to orthogonal rotation by varimax. The factor analysis was conducted again under varimax rotation.  The internal consistency for the seventh factor was very poor but upon deleting two variables it improved to 0.592. But having two variables in a factor did not seem to communicate a clear latent factor, this prompted another factor analysis to be run with fixed numbers of 6 factors instead of 7.
The 6 factors retained were given umbrella names as follows. More details are tabulated in Appendix

Situation of BIM Adoption in Nairobi, Kenya
The in-depth interview showed that BIM adoption in Kenya is still low, due to shallow understanding of BIM, this argument was based on observations made World Journal of Engineering and Technology by the respondents from their interactions in the construction industry. The descriptive statistics showed the adoption rate of 56.6%, it also showed that though 96% of the respondents knew what BIM is, only 33% rightfully stated it is not a software, 65% believed that BIM is a software and the remaining 2% did not know whether it is a software or not. A cross-tabulation of this contradiction is shown in Table 6, where 62.6% of those who have adopted BIM believed BIM is a software the trend is similar for the non-adopters, those planning to adopt and those who had partially adopted. The low level of adoption was because of high cost of implementation, lack of proper training, lack of awareness and knowledge, lack of contractual guidance, lack of necessary skills, change resistant attitude, and lack of understanding. Other factors include, Education curriculum failure to include BIM, complexity of BIM, lack of leadership, inadequate sensitization, size of projects dictating adoption, lack of case studies and lack of BIM champions. Further, Contractors unwillingness to adopt, client's failure to require BIM, inflexible employers, unfavourable procurement rules, rigid traditional procurement system and lack of government mandate are other reasons for low adoption level. These low numbers contribute to difficulty in collaboration.
Respondents opined that BIM complements professional work, other benefits include, time and cost saving, generative designs, and real-life simulation. Complex projects design can be handled without having to expand the workforce.
Additionally, lifecycle information storage and management make operation and maintenance easier and cost effective.
According to the respondents, BIM has influenced contract management by making it easier. Additionally, BIM facilitates, collaboration, improved quality, business benefit, positive ROI, easier decision making, clash detection, early problem detection in professional relationships. It also makes it easier for parties to appreciate design components, reduces adversarial relationships, it eliminates inconsistencies and abortive works. Bills of quantities are more accurately done, it gives transparency, empowers clients to appreciate real-time 3D visualization.
It thus enables risk management through early identification and mitigation.
There is emergence of new roles such as BIM manager, BIM coordinator and BIM Consultant.

Discussion
From the results of the research, the BIM adoption level in Nairobi was estab- Legal risks: 15 variables loaded under this factor, data security loaded highest and contractual guidelines loaded the least. BIM operates in a digital environment unlike the traditional system that operates with hardcopy documentation, security of data thus becomes an immediate concern as people implement BIM.
Processes need to be revised, responsibility and liability should be assigned to the right professionals, which should include the new skills brought by BIM.
Legislation and legal precedence rated the fourth highest; being Efficiency: 14 variables loaded under efficiency with better coordination loading the highest and BIM definition the least. The benefits of BIM make ECM easier and enable efficiency in projects through, better coordination, collaboration, clash detection, improved accuracy, time saving, improved communication, buildability, intelligent 3D visualization, cost saving, real-time capabilities, better decision management, transparency and quality improvement. BIM definition variable defines BIM and depicts the influence of efficiency on ECM.
Versatility: 11 variables loaded under versatility, safety management loaded highest and consistent lifecycle information loaded the least. BIM brings versatility to ECM, coordination of those aspects of a construction project that were traditionally separate from design, are centrally managed. For instance, Safety management is a major concern in construction sites, BIM real-time monitoring, evaluation and analysis ensures mitigation measures are put in place in time, this applies to risk management in general. Further, positive ROI realized by professionals and clients, leads to, improved customer client relationship. Other aspects are improved facility management, sustainability, and energy analysis. Ensuring consistent lifecycle information hence making ECM easier.
Mandate and leadership: 12 variables loaded under this factor, the government should adopt their procurement process to suit collaborative BIM loaded highest and written materials to guide BIM implementation loaded the least. When it comes to new technologies the authorities become vital in enabling countrywide implementation. Legal validation of the digital model to the Nairobi County Council can only function through a mandate. The government may need to make BIM implementation compulsory, hence requiring revised or new sets of standard forms of contract. The mandate will ensure Kenyan consultants are equally competitive as their international counterparts towards winning construction contracts. A regulatory body mandated by the government is important to help with standardization of BIM within the country. The government should also mandate the digital BIM model to be recognized as a contract document. Case studies on BIM projects and noteworthy BIM publications in Kenya, will be important in guiding stakeholders in BIM adoption hence abandon the traditional procurement system which is not receptive to technological advancement.
Competitiveness: 6 variables loaded under competitiveness with my organization needing standards and guidelines loading the highest and size of the project loading the least. An organization having standards and guidelines on BIM and engaging a BIM consultant is a good indicator of international compe-World Journal of Engineering and Technology titiveness in ECM. Pressure to remain competitive shows that progressive trends are themselves full of pressure to stay at the top. Additionally, the necessary technological tools must be put in place. The bigger the project the more the need to implement BIM, smaller projects seem not to be presenting contract management challenges.

Conclusions
Definition of influence in the context of this paper is to have an effect or change on how something develops or behaves. BIM adoption and implementation have an effect on the development of ECM in response. Legal implications call for a legal framework purposely for the BIM system. There is a need for increased awareness and knowledge whereby perception and understanding of BIM and its benefits make contract management easier, reducing risks, improving relationships, saving resources, and giving business benefits. Components of BIM regarded to be important for its adoption are increasing efficiency in ECM. Versatility of BIM capabilities bring more advantages beyond the primary ones depicted by efficiency factor. Further, new relationships will be created such as contractor's and facility manager's early involvement in the project, inevitably, novel risks ensue, that require a BIM system solution and not a solution from the traditional system.
The government and its agencies have a responsibility to revise the Kenyan procurement ACT to suit collaborative BIM. International competitiveness requires that professionals use the most efficient tools to sell their engineering creativity, this competitiveness package enables projects success. BIM is slowly but aggressively demanding for standards, guidelines, policy, legal framework, and regulations, this will improve contractual relationships and give contractual guidelines on roles, relationships, and risks. Ultimately this will enable effective ECM.
Adoption and implementation of BIM requires awareness of what BIM is, leadership to give guidance, education to build technical capacity, training to advance the skills and necessary technology to execute the BIM process. There is generally low understanding of BIM in Nairobi; therefore, the players in the construction industry should make understanding of BIM an urgent pull factor towards efficient and effective ECM. Future studies should find out if this state is changing. World Journal of Engineering and Technology Table   Factor Variable Loading factor