Question

The construction industry is evolving towards greater use of integrative construction procurement strategies such as design and build, early contractor’s involvement, and/or turnkey contract: (a) Discuss any limitations in the cost planning process against the backdrop of a construction industry that adopts a more integrative construction approach.

Answer 1

Limitations in the cost planning process against the backdrop of a construction industry that adopts a more integrative construction approach:

Construction industry is labour intensive means it is depended on manual work, so in design and planning, most of work should done by Engineers only. Because they should understand the soil condition, environment challenges etc.

In the planning of facilities, it is important to recognize the close relationship between design and construction. These processes can best be viewed as an integrated system. Broadly speaking, design is a process of creating the description of a new facility, usually represented by detailed plans and specifications; construction planning is a process of identifying activities and resources required to make the design a physical reality. Hence, construction is the implementation of a design envisioned by architects and engineers. In both design and construction, numerous operational tasks must be performed with a variety of precedence and other relationships among the different tasks.

Several characteristics are unique to the planning of constructed facilities and should be kept in mind even at the very early stage of the project life cycle. These include the following:

• Nearly every facility is custom designed and constructed, and often requires a long time to complete.
• Both the design and construction of a facility must satisfy the conditions peculiar to a specific site.
• Because each project is site specific, its execution is influenced by natural, social and other locational conditions such as weather, labor supply, local building codes, etc.
• Since the service life of a facility is long, the anticipation of future requirements is inherently difficult.
• Because of technological complexity and market demands, changes of design plans during construction are not uncommon.

In an integrated system, the planning for both design and construction can proceed almost simultaneously, examining various alternatives which are desirable from both viewpoints and thus eliminating the necessity of extensive revisions under the guise of value engineering. Furthermore, the review of designs with regard to their constructibility can be carried out as the project progresses from planning to design. For example, if the sequence of assembly of a structure and the critical loadings on the partially assembled structure during construction are carefully considered as a part of the overall structural design, the impacts of the design on construction falsework and on assembly details can be anticipated. However, if the design professionals are expected to assume such responsibilities, they must be rewarded for sharing the risks as well as for undertaking these additional tasks. Similarly, when construction contractors are expected to take over the responsibilities of engineers, such as devising a very elaborate scheme to erect an unconventional structure, they too must be rewarded accordingly. As long as the owner does not assume the responsibility for resolving this risk-reward dilemma, the concept of a truly integrated system for design and construction cannot be realized.