Michael C. Vorster

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Work changes are alterations to the original scope of a contract. Work changes are inevitable in a typical construction project due to the complex nature of the construction industry. It is not possible to foresee these changes at the pre-construction or bidding stages. The changes may affect originally planned means and methods and, thus, may impact the(More)
Earthwork projects involve moving specific amounts of earth from a discrete set of source locations to a discrete set of destinations. Constructors use different methods and equipment to move earth depending primarily on haul distance and equipment availability. Successful earthwork projects involve successively refined cycles of construction plan(More)
(ABSTRACT) Simulation modeling and visualization can substantially help in designing complex construction operations and in making optimal decisions where traditional methods prove ineffective or are unfeasible. However, there has been limited use of simulation in planning construction operations due to the unavailability of appropriate visual communication(More)
Heavy construction equipment is routinely used on construction projects that entail earthmoving operations. Owning and operating these machines may comprise a significant portion of the project costs. An important element of the owning costs is the residual value. However, the nature of the residual value of construction equipment is largely unknown.(More)
Earthwork projects involve moving specific amounts of earth from a discrete set of source locations to a discrete set of destinations. Constructors use different methods and equipment to move earth depending primarily on haul distance and equipment availability. Successful earthwork projects involve successively refined cycles of construction plan(More)
It is argued that the two principal components of simulating earthmoving operations are modeling and providing input data. The knowledge and proficiency in modeling has been substantially improved through general purpose simulation systems such as CYCLONE and STROBOSCOPE. However, the inability to provide statistically reliable input data to the models is(More)
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