Project Delivery System

1673 Words4 Pages

A fundamental truth in construction is that every project is unique. As a result, every project presents new challenges as well as new opportunities for owners, designers and constructors. In recent history, the predominant delivery system for construction projects has separated the design and construction portions of the project, but several others are used as well. A number of studies have been performed which have attempted to quantify the relative benefits of each approach. Some useful results have been obtained, but overall the results have been inconclusive. The selection of a delivery system depends upon a number of factors including the general project requirements, the experience level of the owner, budget, time constraints and many others. Careful selection of a delivery system that best suits the project is perhaps the most important decision an owner will make on a project. The extra attention and effort put into the initial phases of the project can yield a smoother, faster, safer and ultimately more profitable result.

Historically, a number of different delivery systems have been used on construction projects. The four main systems used today are known as: Design-bid-build, CM (construction management) agency, CM at risk and Design Build.

The design-bid-build method is performed in the three distinct phases of design, construction and commissioning, with little overlap between the first two in particular. This process begins when an owner retains an architect to develop a design which meets their performance and budget specifications. An important note is that there is typically no constructor involvement during the design process and that the cost estimates provided by the architect are often very rough. The inherent lack of constructor input during the design process is a key weakness of the design-bid-build delivery method. In fact, constructor involvement begins following the completion of the design documents in a process of competitive bidding. The complete construction documents are made available to a number of competing contractors and the one who returns the lowest cost for responsible completion is awarded the project. The main benefit of this delivery system is that it removes any appearance of impropriety in the awarding of contracts. It has also been traditionally believed that the design-bid-build method yields the lowest possible cost. Recent successes of alternative delivery methods however, have challenged this assumption. The design-bid-build approach provides a transparent and simple to understand delivery system best suited for inexperienced owners or agencies legally bound to its use.

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