Construction contractors are often faced with projects containing multiple units wherein activities repeat from unit to unit. These require schedules that ensure the uninterrupted usage of resources an activity in one a similar next The critical path method (CPM) cannot assure this requirement because only technical precedence and resource availability constraints explicitly shown CPM networks. repetitive scheduling (RSM) described paper recognizes also includes additional continuity...

This paper examines the characteristics of discrete-event simulation systems in terms their application breadth (general or special purpose), modeling paradigm (process interaction versus activity scanning), and flexibility (programmable not). Several construction are examined with primary emphasis on CYCLONE STROBOSCOPE as representatives wide range tools that currently available. is a well-established, widely used, simple system easy to learn effective for many operations. programmable...

The major drawback of the low‐bid method, often used for competitive bidding in U.S. construction industry, is possibility awarding a contract to contractor that submits, either accidentally or deliberately, an unrealistically low bid price. Often, such occurrence works owner's and contractor's detriment by promoting disputes, increased costs, schedule delays. To address this problem, other countries have adopted average‐bid method award whose price closest average all bids submitted. This...

Stroboscope is a programming language designed for the simulation of processes common to construction engineering. These are very complex and involve many different types resources. As result, also an efficient effective general purpose system. The paper presents overview illustrates how it can be used model example taken from classic literature.

The decline in government funds and the increased demand on public agencies for construction of new (or rehabilitation existing) infrastructure projects has led to growth alternative forms project development, such as BOT BOO. Desirability Model, presented this paper, is a multiattribute evaluation model that provides logical, reliable, consistent procedure assessing capability private-sector company become promoter given attractiveness an be actively promoted by company. proposed was...

The low-bid method, typically used for competitive bidding in the United States, may result a contract with firm that submits either accidentally or deliberately an unrealistically price. Such occurrence hurts both owner and contractor by promoting disputes, increased costs, schedule delays. To address this problem, other countries have adopted methods based on average of bids submitted. One such approach is below-average method where winning bid closest to but below all bids. A model...

Projects with repeating activities, such as multistory buildings and highways, present unique scheduling challenges. This paper presents the necessary requirements that systems should address to meet needs complexities of repetitive projects in practice. The method (RSM) provides a unified framework applies all types projects. In RSM, are classified discrete (vertical) or continuous (horizontal linear) then uniform nonuniform, depending on whether progress is measured using counting scale...

The comparison of alternative construction methods is one the principal reasons for using simulation to model processes. efficiency and effectiveness such comparisons can be greatly improved by prudent use "matched pairs," a variance reduction technique based on dedicated fully synchronized random number streams. basic methodology illustrated STROBOSCOPE system compare two rock tunneling [Conventional versus New Austrian Tunneling Method (NATM)]. For this example effects are dramatic....

Article Free Access Share on Graphical object-oriented discrete-event simulation system Authors: Liang Y. Liu View Profile , Photios G. Ioannou Authors Info & Claims WSC '92: Proceedings of the 24th conference Winter simulationDecember 1992 Pages 1285–1291https://doi.org/10.1145/167293.167915Published:01 December 1992Publication History 43citation507DownloadsMetricsTotal Citations43Total Downloads507Last 12 Months37Last 6 weeks5 Get Citation AlertsNew Alert added!This alert has been...

Concession agreements can be used by governments to induce the private sector develop and operate many types of infrastructure projects. Under this type arrangement, several private-sector companies join forces, become project promoters, form a separate company that becomes responsible for financing, building, operating facility. Before formed, prospective promoters must determine how fund associated construction startup costs. They decide much borrow, infuse from their own funds, raise...

Stroboscope is a programming language designed for the simulation of processes common to construction engineering. These are very complex and involve many different types resources. As result, also an efficient effective general purpose system. The paper presents overview illustrates how it can be used model example taken from classic literature.

The Advanced Construction Technology System (ACTS) is a computerized data base for the classification, documentation, storage, and retrieval of information about emerging construction technologies. ACTS consists custom Microsoft (MS) Windows application, keyword files It currently includes technologies that relate to civil, architectural, electrical, instrumentation, mechanical, piping systems. Technologies have been classified according CSI Masterformat, indexed using predetermined set...

Geologic uncertainty in underground construction often leads to design and conservatism thus inflated costs. This paper presents a general model for the probabilistic prediction of tunnel geology as basis developing more effective decision support systems. The geologic conditions along alignment are modeled by set parameters (e.g., rock type, joint density, degree weathering, etc.), each following continuous‐space, discrete‐state Markov process. state probabilities parameter initially based...

Several competitive bidding models since the late 1960s have been founded, criticized, and even rejected, based on incorrectly stated arguments concerning apparent symmetry of positions prospective bidders. The proliferation these has led to confusion about validity proposed models. This paper: (1) Illustrates correct use in as a function available information control; (2) explains differences among nonsymmetric states that lead case only two competitors; (3) presents assumptions Friedman's...

The line of balance (LOB) method has long been used to model construction projects with repetitive units. Critics, however, indicate two major shortcomings applying LOB in the industry: (1) it not yet adapted numerical computation as readily network methods; and (2) relies on restrictive assumptions therefore cannot treat practical concerns concluded this paper. To all provide necessary calculation power, a new scheduling system is proposed: Repetitive Scheduling Method (RSM) its...

Change orders lead to the modification of construction works, which has a direct impact on various aspects projects, including scope, budget, and schedule. The traditional change order process involves production communication significant amount information, usually in form paper-based documents that are mostly narrative not well organized. It is therefore difficult for all project participants understand physical changes work identify information necessary determining resulting time cost...

Construction operations are often repetitive not only in terms of time (the same tasks performed over and over) but also space repeated at several places, such as different floors a high-rise building). Thus, construction simulation models general must be cyclic to represent temporal repetitions, scaleable spatial repetitions. This paper presents the mechanisms for preprocessor replacement automatic code generation that have been designed implemented facilitate development STROBOSCOPE,...

Eight successively refined simulation models for the earthmoving operations involved in construction of a dam provide foundation illustrating ease and effectiveness modeling complex processes by using STROBOSCOPE, modern system based on programming language that follows activity-scanning paradigm. This approach use characterized resources stochastic environment make typical engineering calculations heavy equipment performance relatively easy to implement significantly more realistic accurate.

Construction processes are very complex and include highly interdependent components subject to activity startup conditions. A simulation language based on cycle diagrams can express the logic of models effectively. This paper uses Stroboscope (STate- ResOurce-Based Simulation COnstruction ProcEsses), a three-phase scanning extended diagrams, model operations quarry. Although simplified, this example is representative nature construction operations.

In this paper we introduce the completed unit algorithm (CU-AL), a probabilistic scheduling methodology for repetitive projects. The has two main advantages, simplicity and short computational time, that facilitate expedite its use in simulation modeling optimization. An integration between CU-AL genetic (GA) is established to optimize problem of maximizing profit projects with activity durations. This GA explained detail through an example project 5 activities 10 units. A model developed...