Delay Analysis in Industrial Projects by using Relative Importance Index Method

International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056
Volume: 04 Issue: 06 | June -2017 www.irjet.net p-ISSN: 2395-0072
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DELAY ANALYSIS IN INDUSTRIAL PROJECTS BY
USING RELATIVE IMPORTANCE INDEX METHOD
RASHID H. TIKOTE1 , MANISHA M. MAGDUM2, MANISH A. KHANDARE3
1(P.G. Student : Civil Engineering Department, RMD Sinhgad School of Engineering (RMDSSOE), Warje, Pune)
2(Assistant Professor : Civil Engineering Department, Sinhgad College of Engineering (SCOE),Vadgaon, Pune)
3(Assistant Professor : Civil Engineering Department, RMD Sinhgad School of Engineering(RMDSSOE),Warje,Pune)
----------------------------------------------------------------------------***------------------------------------------------------------------------
Abstract - One of the most common problems in the
industrial project is delay. Delay in a construction project
can be defined as the late completion of works as compared
to the planned schedule or contract schedule. Construction
projects can be delayed due to so many factors. It may be
due to consultant, contractor, material, equipment, finance
etc related factors. The aim of this paper to identifying the
causes and effects of delays in industrial projects. This has
been achieved by undertaking a critical analysis of the
literature and carrying out a questionnaires survey. The
twenty questionnaire surveys were completed by taking
interviews of the respondent, i.e., consultants and
contractors who works on industrial projects. Then the
causes of delay assessed using Relative Importance Index
(RII) so as to rank the factors .Also use the Spearman’s Rank
Correlation Coefficient test to determine significant
correlation between contractors and consultants
perspective. The most significant factors of construction
delays were identified as: (1) Local political interference; (2)
Inadequate fund allocation; (3) Improper project planning
and scheduling; (4) Delay in progress payments by client; (5)
Escalation of material prices. Also major effects of delay
were identified that are (1) Time overrun; (2) Cost overrun;
(3) Disputes. The results also include the most effective
methods for minimizing construction delays.
Keywords: Industrial projects, Delay, Relative
importance index, Spearman’s rank, Correlation
coefficient
1. INTRODUCTION
The construction industry is a very important sector
for the development and economic growth of
developing country (Haseeb et al., 2011). A
construction project is commonly acknowledged as
successful, when it is completedontime,withinbudget
and in accordance with the specifications (Murat
Gunduz et al., 2013). Over manyyears,delayhasbeena
popular topic in construction management research,
and various delay studies have been carried out for
different purposes (Abdullah AlSehaimi et al., 2013).
Construction projects in India are infamous for delays
and cost overruns. Very few projects get delivered
within time and within cost. The delays and cost
overrunshavebecomehallmarkofconstructionproject
in India. Bandra-Worli Sea Link was planned as a Rs.
300 Crore project to be completed by 2004; but its
actual cost is Rs. 1,600 crore along with five years
delay. Indeed, very few projects get delivered in time
and on cost. Delays on construction projects are a
universal phenomenon. They are almost always
accompanied by cost and time overruns (Sadi Assaf
and Sadiq Al-Hejji, 2006). Project delays have a
debilitating effectonallparties(owner,contractor,and
consultant) to a contract in terms of a growth in
adversarial relationships, distrust, litigation,
arbitration, cash-flow problems, and a general feeling
of apprehension towards each other (Abd. Majld and
Ronald McCaffe, 1998). Several factors can contribute
to delays on a project and analyzing the causes of
delays is an essential task for ameliorating any
potentialconflictsorclaims(MuhweziandOtim,2014).
The study is to identify the major causes of delays in
construction projects in constructionindustrythrough
a survey and to find the perception of the different
parties towards the problem, what their
responsibilities are and how they carry them out. It is
expected that this study will provide some good
empirical data on the extent and type of delays in
construction projects.
2. LITERATURE REVIEW
Several articles have discussed causes of delay in
construction projects in numerous manners; some
studies identified the main causes of delay in
several countries and various project types, while
other studies discussed the delay analysis methods

and the proposed ways to mitigate it. The study of
Baldwin et al. (1971) was carried out to determine
the causes of delay in the construction process in
the United States. Mansfield et al. (1992) which
investigatedthe causes of delay andcost overruns that
affect completed highway projects in Nigeria.
Murat Gunduz et al. (2013) identified the total 83
different delay factors and addressed the most
significant factors and groups of causes of delays
through ranking results. Sadi Assaf et al. (2006)
identified seventy threecausesofscheduledelayexist
in Saudi construction projects. They found that the
most important causes of schedule delay as seen by
contractors were: delay in progress payments by
owner, late approving design documents by owner,
change orders by owner during construction. Abd
El-Razek et al. (2008) identified the thirty two causes
of delay in construction projects in Egypt. The
overall results indicated that the most important
causesare:financingbycontractor during construction,
delays in contractors payment by owner and non
utilization of professional contractual
management. Muhwezi et al. (2014) studied the
effects of delays on building construction projects in
Uganda, using Kampala as the case study so as
appropriate mitigation measures are put in place to
amelioratetheeffectsofdelay. Abdullah Al Sehaimi et
al. (2013) studied simple analysis and evaluation
of the findings and recommendations of published
studies of construction delay in developing countries.
3. RESEARCH METHODOLOGY
The research methodology will explain how the
objectives of this study can be achieved. Firstly,
questionnaire was divided into two main parts. Part A
includes the details of the respondents and
organizations in order to get the information about
the respondents details and organization as well.
Part B includes three sub-sections, Section I
includes the questionnaire of factors causing delay,
Section II includes the questionnaire of effects of
delay and section III includes the questionnaire of
method of minimizing delay.
In Section I, seventy six factors causing delay
were identified from in-depth literature studies
and discussing with some construction practitioners.
These factors then grouped into eight major groups
which are Material related delays, Labour related
delays, Equipment related delays, Contractor
relateddelays,Consultantrelated delays, Client related
delays, Finance related delays and External related
delays. Material related group includes ten factors
whichare: Shortageofconstructionmaterialinmarket,
Late delivery of materials, Changes in material
specification during construction, Poor procurement
of construction materials, Imported of construction
materials, Delay in manufacturing materials,
Unreliable suppliers, Damage of sorted materials,
Poor quality of construction materials and
Escalation of material prices. Labour related group
includes eight factors which are: Strike, Labor
supply, Personal conflicts among labour, Labour
productivity, Shortage of skill labour, Slow
mobilization of labour, Low motivation and
Absenteeism. Equipment related group includes
seven factors which are: Insufficient numbers of
equipment, Equipment allocation problem,
Inadequate modern equipment,
Improper equipment, Frequent equipment
breakdown, Slow mobilization of equipment and
Shortage of equipment parts. Contractor related
groupincludesthirteenfactorswhich are: Inadequate
contractor experience, Inappropriate construction
methods, Poor site management and supervision,
Site management, Improper technical studies by the
contractor during the bidding stage, Improper
project planning and scheduling, Incompetent project
team, Delays in subcontractors work, Poor
communication and coordination with other parties,
Rework due to errors, Inaccurate time estimate,
Inaccurate cost estimate and Obsolete
technology. Consultant related group includes
eight factors which are: Lack of experience of
consultant in construction projects, Poor design and
delays in design, Delay in approving major changes
in the scope ofworkbyconsultant, Slow response and
poor inspection, Inaccurate site investigation,
Incomplete drawing/detail design, Poor
communication and coordination with other
parties and Inadequate project management
assistance. Client related group includes ten factors
which are: Slow decision making by client, Change
orders by the owner during the construction, Delay
in progress payments, Conflicts between joint-
ownership, Lack of experience of client in
construction, Client interference, Delay in site
delivery, Lack of capable representative, Lack of
communication and coordination and Improper
project feasibility study. Finance related group
includes seven factors which are: Inadequate fund
allocation, High interest rate, Monthly payment
difficulties, Delaypaymenttosuppliers/subcontractors,

Unreasonable constraints to client, Client’s financial
difficulties. Finance related group includes thirteen
factors which are: Local political interference,
Weather condition, Changes in government
regulations and laws, Loss of time by traffic
control and restriction at job site, Natural
disasters (flood, hurricane, earthquake), Accidents
during construction, Unexpected geological condition
(Such as high water table, etc.), Inflation/Prices
fluctuation, Delay in providing services from
utilities (such as water, electricity), Slow site
clearance, Conflict, war and public enemy, Problem
with neighbors and Unforeseen ground condition.
Section II of B questionnaire included the sixeffects
of delays which are: Time overrun, Cost overrun,
Dispute, Arbitration, Litigation and Total
abandonment.
Section III of B questionnaire included the total
thirty two methods of minimizing construction
delays which are: Competent D Capable project
manager, Ensure adequate and available source of
finance, Multidisciplinary/competent project team,
Availability of resources, Commitment to projects,
Adopting a new approach to contract award
procedure by giving less weight to prices and more
weight to the capabilities and past performance
of contractors, Complete and accurate project
feasibility study and site investigation,
Acceleration of site clearance, Comprehensive
contract documentation, Frequent progress meeting,
Awarding bids to the right/experience consultant
and contractor, Use up to date technology
utilization, Use of experienced subcontractors and
suppliers, Complete and proper design at the right
time, Competent personnel of consultant/
designer, Competent and capable of client’s
representative, Site management and supervision,
Use of proper and modern construction
equipment, Proper project planning and
scheduling, Accurate initial cost estimates, Use of
appropriate construction methods, Proper
material procurement, Effective strategic planning,
Systematic control mechanism, Perform a
preconstruction planning of project tasks and
resources needs, Absence of bureaucracy,
Allocation of sufficient time and money at the
design phase, Accurate initial time estimates,
Frequent coordination between the partiesinvolved,
Developing human resources in the
construction industry through proper training,
Clear information and communication channels
and Project management assistance.
These questionnaires were based on the Likert
Likert’s scale of five ordinal measures from 1 to 5
(very low effect to very high effect) according to
level of contributing.
4. DATA ANALYSIS AND DISCUSSION
The procedure used in analyzing of data was aimed at
establishing the relative importance of the various
factors that contribute to causes of delays,
effects of delays and methods of minimizing
construction delays. There are three steps used in
analyzing the data: calculating the relative
importance index; ranking of each factors based
on relativeimportanceindex,andtodetermine degree
of correlation on ranking the factors among the two
groups.
4.1 Relative Importance Index
The contribution of each of the factors to overall
delays was examined and the ranking of the
attributes in terms of their criticality as perceived by
the respondents was done by use of Relative
Importance Index (RII) which was computed
using equation and the results of the analysis are
presented in Tables 1 to 3. To determine the ranking
of different factors from the viewpoint of
contractorsandconsultants,the Relative Importance
Index (RII) was computedusingRIIEquation(Abdalla
Odeh andHusseinBattaineh,2002;MuratGunduz etal.,
2013; and Muhwezi and Otim, 2014).
Table – 1 : Most Important Factors Causing Delays

RII = W/(A x N)
Where
W=Weight agegiventoeachfactorbythe respondents
A = Highest weight (i.e., 5 in this case) N = the total
number of respondents
Table 1 shows the ranking of top ten factors that
causes delay from seventy six delay factors. That
means these ten factors causing delay are more
contributing into the industrial projects.
Table 2 shows the ranking of various effects of
delay. Top effects indicate very high frequency of
occurrence in industrial projects.
Bar Chart 1 shows the time overrun is the top most
significant effect of delay among six effects of delay.
Table - 2: The Common Effects of Delays
It also indicates the cost overrun and disputes are also
major effects of delay.
Table 3 shows the ranking of the relative importance
of top ten methods of minimizing construction
delays from total thirty two methods. It indicates that
theseten methods are more effective methods for
minimizing construction delay
Table - 3: Methods of Minimizing Construction
Delays
4.2The Spearman’s Rank Correlation
Coefficient Test
The Spearman rank correlation is used to know
whether there is disagreement or agreement
between the two groups on ranking factors. This
test is used to find and compare how well the
contractors and consultants agree on the
relative importance of the delay causes. A perfect
positive correlation
(rs = +1) indicates that the two samples rank
each object identically, whereas a perfect negative
correlation
(rs = -1) indicates that the ranks of the two samples
have an exactly inverse relationship. It might be
said then that sample estimates of correlation
close to unity in magnitude imply good correlation,
whereas values near 0 indicate low or no
correlation (Sadi Assaf et al., 1995; Sadi Assaf
and Sadiq Al-Hejji, 2006; and Abdullah
AlSehaimi et al., 2013).

Figure-1 : Effects of Delays
In order to determine there is significant correlation
of the ranking of factors that causesdelays,effectsof
delays,andmethods of minimizing construction delays
between contractors and consultants perspective, the
Spearman’sRankcorrelationcoefficientwas computed
as following equations and the results of the analysis
are presented inTable 4 (Abdalla Odeh and Hussein
Battaineh, 2002;AbdEl-Razeketal.,2008;andIbrahim
Mahamid et al., 2012):
Table 4: Results of Spearman’s Rank Correlation
Coefficient Test
rs = 1 – [(6 Σ d2 )/(N3– N)]
rs = Spearman’s Rank correlation coefficient
d = the difference in ranking between the contractors
and consultants
N = the number of variables
This calculated value of rs is compared with critical
value of rs from the standard table for n samples.
Null hypothesis: Ho: No significant agreement in the
rankings among the two groups.
Alternative hypothesis: H1: Agreement in rankings
among the two groups.
Compare the value against the critical value. Reject the
null hypothesis, if rs is greater than the critical value.
Table 4 shows the results of tests of Spearman’s Rank
Correlation Coefficient for different groups of
construction delay. This Table 4 indicates Material,
Contractor, Client, Finance and External related delay
groups agree on the ranking given by both contractors
and consultants.
Figure 2: Groups of Causes of Delays
Contractor related group causing delay and finance
related groupcausingdelayarethetopmostsignificant
group that contributed to causes of delaysamongeight
groups shown in bar Chart 2.
5. CONCLUSION
In a construction project where time truly equals
money, the management of time is critical, thus
predicting the likelihood of schedule delay may play
a key role towards project success. There existed a
need to develop a probabilistic schedule delay
analysis model in construction projects as a decision
support tool for contractors before the bidding stage.
From total seventy six factors causing delays, top
ten most important factors have been identified
which are: Local political interference, Inadequate
fund allocation, Improper project planning and
scheduling by contractor, Delay in progress payments
by client, Escalation of material prices, Weather
condition, Delay in payment to
suppliers/subcontractors, Insufficient numbers

of equipment, Incomplete drawing/detail design
and Natural disasters (flood, earthquake, etc.).Total
seventy six factors causing delay were identified
and grouped into eight major groups. The major
delays groups were identified are: Contractor related
delaysand Finance related delays.
The major effects of delays have been identified
which are: Time overrun, Cost overrun and Disputes.
From total thirty two methods of minimizing
construction delays, the top ten effective methods
have been identified which are:
Competent/Capable project manager, Perform a
preconstruction planning of project tasks and
resources needs, Accurate initial cost estimates,
Ensure adequate and available source of finance,
Multidisciplinary/competent project team, Use of
proper and modern construction equipment,
Proper project planning and scheduling, Use of
appropriate construction methods,Useofexperienced
subcontractors and suppliers and Site management
and supervision.
5.1Recommendations to Minimize Delays
Based on this study, some recommendations are
given as follows:
We divide the recommendations into three
groups:
1) Recommendations for the clients,
2) Recommendations for the consultants, and
3) Recommendations for the contractors.
5.2Recommendations for the Clients
• Appropriate funding levels should always
be determined at the planning stage of the
project so that regular paymentshouldbepaid
to contractors for work done. Therefore,
clients should work closely with the financing
bodies andinstitutionstoreleasethepaymenton
schedule.
• Clients should not interfere frequently during
the execution and keep making major changes
to the requirements. This can cause inordinate
delaysintheproject.
While selecting the contractors, clients have
to make sure that the contractors are not selected
based only on the lowest bid. The selected
contractor must have sufficient experience,
technical capability, financial capability, and
sufficient manpower to execute the project.
• Communication and Co-ordination should be
proper with the other parties.
• Site should be delivered as soon as possible
after project is awarded.
5.3Recommendations for the Consultants
• All working drawings must be clearly drawn
indicating all the dimensions and scale so as to
avoid ambiguity during construction.
• Avoid the redesign of the project once
submitted.
• Accurate site investigation should be done in
order to avoid errors in design.
• Establish control system to control and evaluate
variation in orders initiated by owner
• Consultantsshouldprepareandapprove drawings
on time.
5.4Recommendations for the Contractors
• Contractors should not take up the job in which
they do not have sufficient expertise.
• Development of good system for site
management and proper supervision
develops project planning and scheduling.
• Initially calculate optimistic duration to execute
the project.
• In order to improve contractors’ managerial
skills there is need for continuous work
training programs to update their knowledge
and be familiar with project management
techniquesand processes.
• Contractors should appoint experienced and
reputed subcontractors.
• Contractors must plan their work properly
and provide the entire schedule to the clients
• Proper workasperspecificationtoavoid rework
due to error.
• Contractors must make sure they have a sound
financial backing

5.5Recommendations for Future Studies
Moreresearchonconstructiondelaysshould be done in
order to develop guidelines, or methodsofminimizing
construction delays. Furthermore, similar research
should be performed in various provinces or cities of
India. In order to providing more reliable data it is
required to carry out studies for each specific type
of construction projects, including highways, dam
construction projects, utilities, etc. Surely,
detailed surveys required to be performed to find out
cashflowproblemsondelaysinconstruction projects.
6. REFERENCES
1. Abd El-Razek M E, Bassioni H A and Mobarak A M
(2008), “Causes of Delay in Building Construction
Projects in Egypt”, Journal of Construction
Engineering and Management, November, pp. 831-
841, ASCE.
2. Abd. Majld M Z and Ronald McCaffe(1998), “Factors
of Non-Excusable Delays thatInfluenceContractors’
Performance”, Journal of Management in
Engineering, Vol. 14, No. 3, pp. 42-49.
3. Abdalla M Odeh and Hussein T Battaineh (2002),
“Causes of Construction Delay: Traditional
Contracts”, International Journal of Project
Management, Vol. 20, pp. 67-73.
4. Abdullah AlSehaimi, Lauri Koskela and Patricia
Tzortzopoulos (2013), “Need for Alternative
Research Approaches inConstructionManagement:
Case of Delay Studies”, Journal of Management in
Engineering, October, pp. 407-413, ASCE.
5. Ali Tarhini, Muhamad Fakih, Mahir Arzoky and
Takwa Tarhini (2015), “Designing Guidelines to
Discover Causes of Delays in Construction Projects:
The Case of Lebanon”, International Business
Research, Vol. 8, No. 6 (Canadian Center of Science
and Education).
6. Chan D W and KumaraswamyMM(1996),“Reasons
for Delay in Civil Engineering—The Case Study of
Hong Kong”, Inst Eng Trans., Vol. 2, No. 3, pp. 1-8.
7. David Arditi and Thanat Pattanakitchamroon
(2006), “Selecting a Delay Analysis Method in
Resolving Construction Claims”, International
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8. Haseeb M, Xinhai-Lu, Aneesa Bibi, Maloof-ud-Dyian
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