A Study of Constructability Issues Related to Various Stages of Design and Construction Process

Sharmin Khan, Asst. Professor, Department of Architecture, ZHCET, AMU, Aligarh.

Introduction

The increasing levels of competition and the introduction of manufacturing concepts within the industry led to specialization. Such specialization led to the separation of design and construction facilities. The increasing complexity of many projects makes it more and more difficult for the designers to be fully aware of all the implications of their designs on the construction costs. With the problems associated with in separated design and construction continuing to grow, industry began implementing value engineering and construction management services, recognizing the benefits of constructor's involvement during planning and design phases to reduce project life cycle cost.

Constructability is an approach which links design and construction processes, which have traditionally been isolated in industry. Making use of construction knowledge, from the earliest stages of a project where the ability to influence cost is at greatest, makes sense from both practical and financial viewpoints. Constructability enhances the quality of constructed facility by better communication among major project participants such as design, engineering and construction professionals. Better communication among these participants reduces the project failure & other related problems.

Drawbacks of traditional system
Traditionally, the independent designer was under contract to client, and owed a duty to client, not to the builder. He was under no legal obligation to introduce good buildability in his design. There is a long established tradition that the builder should do as the designer tells him and that he is not province to suggest amendments to the designer. This lack of dialog has effects on the design. Increasing amount of rework is a proof of inefficient and uneconomical construction. It is a result of poor construction techniques or poor construction management. There is an emergent need for the introduction of processes which can integrate the design and construction process. A joint approach is the need of time so that the two distinct processes of design and construction go hand in hand. The level of tolerance and acceptance of the other professional's qualities and inputs is a major issue that needs to be addressed.

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