This document provides a summary of the literature on construction project and change order management. It begins with an introduction to construction project management and the unique characteristics of construction projects. It then discusses contemporary research on change request and order management. Construction projects experience many changes for various reasons, so effective change management is important to control costs and schedules. The literature review identifies common causes of changes such as design errors, owner requests, and market conditions. It also examines the impacts of changes, including increased expenses and delays. Future research directions are needed to better understand change formation and dynamic configuration management in complex construction projects.
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for changes. Several factors can demand changes which could prove expensive and would
probably be disliked intensely by all parties.
These occurrences have to be considered from initial stages till the final stages. In the
best interest of the construction it’s better to add a change clause on the contract and also
describe how the owner, consultant and contractor will handle the changes. Procedure should
be in place describing process of change from conceptual development till it goes on to the
field. Generally a hostile atmosphere exits between the parties in the construction industry. In
such a scenario changes must be managed to bring the cost down. Huge schedule and
consequences can bring in huge costs and schedule overruns.
2. NOMENCLATURE OF CONSTRUCTION PROJECT MANAGEMENT AND
RESPONSIBILITIES
2.1 Construction Project Management
Construction industry is very different from other industries like the automobile,
consumer food and textile industry. Here we shall discuss what construction industry is all
about. It’s process and how important it is for the national and international economy.
2.2 Peculiarities of the construction, its products, and its production processes
Construction industry comprises of designing, constructing, maintenance and
utilization of constructs. Also it includes modulation, modification, demolition and
deconstruction of constructs [2]. This industry contributes majorly to the economy and is also
responsible for environmental changes to an extent. We can conclude here that construction
industry influences economic, social and ecological issues during the entire tenure of the
constructed product.
Construction industry can be bifurcated into two wide categories. One is the general
building construction and the other is the engineered construction (see fig 1 [1]). General
building construction has four further divisions:
• Residential building (places where people reside)
• Commercial construction (this includes stores, malls, offices, manufacturing units)
• Institutional construction (hospitals, schools, Government buildings and stadiums
fall in this category)
• General building construction (large scale projects, heavy plants and factories)
Contrary to the general building construction, engineered construction focuses more
on functionality than aesthetics. Engineers prepare the design. These projects are generally
owned by public entities and are related to public infrastructure. Such projects are funded
with bonds, rates and taxes. Engineered constructions have two common subcategories. One
is highway construction and other is heavy construction. Here highway construction includes
special lightning and signage, installation of bridges, embankment constructions, and
excavations. While heavy construction projects are construction of dams, tunnels, rapid
transit systems, pipelines, airports, water lines and different utility works [1].
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Figure 1[1]: Segments of the construction industry
2.3 Characteristics of the construction industry
The construction industry significantly differs from traditional manufacturing
industries1, such as the automobile, consumer food, and textile industry. In the following, a
common understanding of the peculiarities of the construction industry, its products,
production processes and stakeholders is created and the relevancy of the construction
industry for the national and international economy is discussed.
2.4 Peculiarities of the construction, its products, and its production processes
The construction industry is that part of the economy which deals with the design,
construction, maintenance, and utilization as well as with the modulation, modification and
demolition or deconstruction of constructs [2]. It is a major sector in most national economies
and a major contributor to environmental changes, both in terms of designing the built
environment as well as in terms of anthropogenic effects on the environment. Thereby, it
impacts economic, social, and ecological issues throughout the whole life cycle of a
constructed product.
The construction industry can be divided into two broad categories: general building
construction and engineered construction, as depicted in Figure 1 [1]. The general building
construction sector can further be divided into four types. The residential construction
comprises buildings for human habitation, for example single-family dwellings, flats,
multifamily townhouses or high-rise apartments. Retail and wholesale stores, shopping malls,
office buildings or small manufacturing facilities belong to commercial construction. The
institutional construction includes constructed assets such as hospitals, schools, government
buildings or athletic stadiums. Especially institutional construction projects are often very
complex and require more planning effort than general building construction projects. The
fourth category of the general building construction is industrial construction in which large-
scale projects are developed and executed. Unusually, these projects are also characterized by
a high technical complexity. Examples for large-scale projects are manufacturing facilities,
such as electric power-generating plants, petroleum refineries or other heavy manufacturing
factories for the manufacturing of, for example, vehicles or rolling equipment.
In contrast to the general building construction, projects of the engineered construction
industry sector usually emphasize functionality rather than aesthetics. Thus, designs are
prepared by engineers and not by architects. Projects in engineered construction are usually
related to the public infrastructure, owned by entities of the public and funded with bonds,
rates or taxes. Furthermore, two common subcategories can be differentiated. While highway
construction projects typically include excavation, embankment constructions, installation of
bridges or special lightning and signage, heavy construction projects refer to, for example,
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dams, tunnels, pipelines, rapid transit systems, airports or different utility works like
electrical transmission systems or water lines [1].
Immobility, complexity, durability, costliness and high degree of social responsibility
are some of the traits exhibited by the construction industry [3]. Buildings are built at the
construction site, which is also referred as point of consumption. The size of the finished
product is massive hence transportation of this from the manufacture site is impossible.
Therefore minus modular and mobile housing, construction products cannot be moved.
Construct stems are complex because of the big amount and varied mixture of
construction materials and components needed for construction as specified by the designers
and the taste of the owners. Compared to manufacturing units where products are smaller, in
construction scenario the products are immobile, big and have higher degree of
standardization. Durability is another important aspect that distinguishes construction
industry from manufacturing industry. End products in the construction industry have long
life span starting from 10 to 100 years. Maintenance, repair, modification and repair also
extend the lifespan of buildings.
Depending on the durability the cost of the product will increase. This is why the
expenditure in construction industry is very high compared to the ones in the manufacturing
industry. Hence a computer or coffee equipment costs much less than a building. But the
good news is that cost involved in the construction process can be decreased by employing
standardization and innovative construction processes.
But this uniqueness in the construction industry has not happened for various reasons
like difficulty in research and development environment. For example in earthquake prone
areas we can use materials which are conducive to build houses in such areas. In such cases
we should also take care to see that materials used for construction do not pose any health
hazard are safe for public, as there is an increased environmental awareness. This scenario is
in contrast with the manufacturing units where products are manufactured in the vicinity of
the manufacturing unit; they are small in size, mobile and has limited impact on general
public.
Construction industry has several phases like design, production, construction, use
and occupation along with the end-of-life phase of construction. Construction projects
include organizing and assembling the construction materials for the final building, while
deconstruction refers to a process of bringing down the building at its end-of-life. This also
opens up recovery or waste management.
Figure 2: Typical building life cycle [4]
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Manufacturing industry has consistent production process and the outcome is high.
The scenario in the construction industry is different. Here there is one of its kind products.
Mass production and joint-production is not possible, also mass production economy cannot
be achieved here. Construction sometimes suffers from unstable demand cycles also
construction is a combination of local production for intermediate products as well as on-site
construction for final assembly. Project based production includes long design phase and is
usually customer driven. As products in construction industry are one of its kinds, the cost
involved here is very high and is heavily dependent on local production. Moreover the
process of production is spilt due to subcontracting. Many times subcontracting leads to low
margins. Construction projects are impermanent organizations; hence all participants here are
temporary. Due to this factor it is difficult to apply improvements through learning,
conviction and collaboration [5] [6].
Supply chain and material management are further more complicated by low
homogeneity, standardization of construction of materials and significantly high number of
materials and components. Also design changes in the later stages of the project will further
aggravate the situation [7]. Added to this there are other issues like incompetent
communication and information practices between the project partners that add to the risk of
the construction projects [8].
Due to these unique natures, planning in the construction industry becomes very
difficult. There is no certainty that Project will work when principles in practice are applied
and also procedures developed from manufacturing industries cannot applied here without
modifications.
Planning gets extremely difficult for all the reasons cited above. Project performance
is not assured by the styles applied in practice. Also alterations are very important here as you
cannot apply methods that are developed for production process in the manufacturing
industries. Methods have to be balanced and reconsidered.
2.5 Characteristics of construction projects and project delivery systems
Project management has many definitions for term project. Projects are characterized
by following elements [9, 10, 11 and 12]:
- Objective: Output referred to expenses, eminence and timing of the project and its
activities.
- Uniqueness: Every project is unique. Construction of building with same specification
will differ because of different resource consumption and environmental conditions.
- Complexity: There are various sub-activities performed to achieve goals. The
relationships between these sub-activities are very complex.
- Temporary: Every project has a commencement and a finish date. Resources should
be used intensely to carry out the project. The length of the project is restricted and
once the project is complete it is terminated.
- Resources: Resources here imply budget, man power and equipment. Resources to
realize the project is generally constrained.
- Uncertainty: Every project comes with some amount of uncertainty attached. Causes
for uncertainty can include disparity in the performance of resources, imprecise data
and inexperience.
- Life cycle: Every project has a lifecycle. Conceptual project design, project definition,
project planning, project execution, and project termination are the five phases of a
lifecycle.
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There are various levels of complexities involved in construction work. From
designing to contracting organizations various particularities are involved. The main ones are
dependency on seasons, time/ resource trade off, simultaneous run of various projects,
unfavorable planning environment, shifting production sites, legislation specific to
construction and spatial constraints.
A construction project manager performs the role of organizing construction work,
which could be projects such as hotels, factories, office blocks, home unit developments,
schools, hospitals and large housing units [13]. To be able to deliver his job responsibility on
time a project manager must,
- Be aware of the plans, guesstimate costs and amount of material needed
- Prepare the construction methods and procedure
- Synchronize the supply of labor and materials
- Supervise the construction and direct his subordinates to see that the construction
happens as planned
- Be aware of building documents and discuss with building owners and subcontractors
- Take care of all payments
- Check that all obligatory regulations, standards and by-laws are implemented in the
building
- Seek advice from architects, engineers and other technical workers that specifications
are met.
Traditional practice calls in for change management. Inappropriate considerations to
accept the change order significantly sways time, cost and profit. Deprivation of change
order also impacts the accuracy, social and business relations. Change management is an
important factor in construction project management due the impenetrability in
reengineering. This has attracted vast majority of managerial research. Further we formulate
up to date verified literature on change management in construction project.
3. CONTEMPORARY AFFIRMATION OF THE RECENT LITERATURE IN
CHANGE (ORDER/ REQUEST) MANAGEMENT
Change request is instrumental in recommending and evaluating change also in
addition or deletion to a project. Change request is formed as an exclusive item and linked
using trace relationships to the necessities and other items associated with the proposed
change.
It’s important to supervise change effectively and this is crucial for the project’s
scope. Cost and schedule should not go out of control. Many large organizations fail due to
this. Change control process will facilitate the team to detect, assess, and endorse the said
changes to the project.
The aim of formal change control process is to foresee, identify and envisage changes
before they can do any damage. Put a stop to deviations. Estimate and comprehend the
impact of changes on the project. Make certain that changes are approved at the proper level
in the organization.
The process that approximates the impact of change, facilitates, documents the
decision and incorporates the change is called as change management process. Change is
unavoidable and needed most of the times. The change management process should
recognize and make note of all modification from contract drawings, terms and provide a
process for approval and authorizations of the project.
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Not only should this document identify the cost impact, but should also know the
schedule, quality and safety considerations. These are very important in the decision making
process. Changes should be dealt with in the required time frame. On approval the change
should be incorporated into the project scope of work. Changes can sometimes get difficult
and cost beyond estimation of individual change orders.
4. CAUSES AND EFFECTS OF CHANGES
Changes are caused by events or conditions that directly activate change in the
construction. A survey was carried out by Chan and Kumaraswamy [15, 19] in Hong Kong to
know the causes of delays in construction projects. Parallel surveys were also conducted in
other places around the world [14, 16, 17, 18, 20, 21, 22, 23 and 24]. Survey identified design
level and external factors as causes for change.
Reasons devised under managerial and operational level, design level and non contextual
level are also significant. Client and contractor were also identified as causes for change.
Survey results [14, 15, 16, 17, 18, 19, 20, 21, 22, 23, and 24] showed the following causes for
changes:
At operational and managerial level factors, this can be a cause of change:
o Complexity in project completion
o Lack of depth in decision making involving all teams
o Poor communication between client, consultant and contractor
o Sluggish movement of information
o Inapt overall structure linking all design teams
o Disagreements/clash
o Safety and security considerations
o Intricacy of the project
o Restrictions and delays
The design level factors, which can be a cause of change:
o Insufficient specification
o Imperfection in design and planning
o Impediment in design information
o Design changes do not match with site conditions
o Faulty design information
o Lack of experience in design team
o Discrepancies between drawings and site conditions
o Irregularity between drawings and site conditions
o Mistakes in design documents
o Variations in work
External factors
o Decision making authority changes
o Regulations change
o Policy and legislation changes
o Geological conditions, local residents, natural disasters
o Other organization, political pressure
o Unanticipated ground, site and weather conditions
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Contractor or client related
o Alteration in construction method
o Construction changes as per clients requirements
o Delay in work at various other levels
o Insufficient contractor experience and managerial skills
o Not enough planning
o Improper control over site resource allocation
o Deficient scheduling, site management, supervision and workmanship
o Unrealistic and unsuitable conditions
The changes in the construction project can lead to modifications in the following aspects:
The finishing time of the project, expense involved in the project, status of the organization,
manpower and finally the quality. Change will directly or indirectly influence various aspects
of the project. Though some changes will cause positive benefits, mostly changes just hamper
the flow of the project.
5. OBSERVATIONS
We conclude that change can be identifies the key challenge in the construction
project scenario. Changes can be vigorous and complicated making its evaluation difficult
and requires exact recognition of concepts and formation process for them. Enhancement and
execution of change management before the project commences is good. So it is obvious that
managerial activities are essential to handle change impacts. Effect of change can be
restricted by the project manager by knowing the facts of design, client agreement and
contractor selection level.
Therefore the aptitude of foreseeing the possible cause that warrants change is a
necessary advantage at managerial level activities. Predictability can be improved by
knowledge discovery prospective in this regard. This in turn can facilitate in assessing the
changes caused by managerial and operational factors. Using this approach it will not be
possible to predict change impacts related to design and contract level. This can be helped by
a dynamic configuration management. The accuracy of change impact predictability can be
improved by change formation analysis.
6. CONCLUSION
A construction project can be successful if the team has the ability to make
inescapable changes during the project. Change is definitely a deviation in the project. This
deviation could be because of design and specification, work schedule or the cost. Knowing
change will result in good change management. Lot of research is happening in this area with
large number of outputs. Construction activities come with a lot of uncertainties. A
combination of these uncertainties can lead to changes. Causes of changes were identified
through questionnaire surveys, case studies and project documentation reviews. Factors
causing changes were also categorized. The impact of these changes can be managed at the
designed and agreement level. Possible changes and their impacts can be improved by
considering knowledge discovery, dynamic configuration management and change formation
path analysis to improve the managerial level prediction ability.
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