scholarly journals An Integrated Expert System for Linear Scheduling Heavy Earthmoving Operations

2016 ◽  
Vol 2016 ◽  
pp. 1-16
Author(s):  
Nizar Markiz ◽  
Ahmad Jrade
Keyword(s):  
Expert System ◽  
Stochastic Scheduling ◽  
Design Stage ◽  
Actual Case ◽  
Major Significance ◽  
Infrastructure Project ◽  
Linear Schedules ◽  
Intelligent Approach ◽  
Line Of Balance ◽  
Scheduling Technique

Heavy earthmoving operations are repetitive in nature and vulnerable to time-related restraints and uncertainties. Therefore, at the conceptual stage, scheduling these operations can take a linear form, known as linear schedule or line of balance (LOB). In such type of work, generating a preliminary line of balance for variable sequencing of activities is crucial. In this paper, an integrated expert system for determining preliminary linear schedules for heavy earthmoving operations at the conceptual stage is presented. The proposed system incorporates numerous factors that influence the analysis of earthmoving operations, which include geological and topographical parameters used to determine productivity rates at the conceptual stage. Also, the proposed system is capable of automatically generating a line of balance based on a stochastic scheduling technique via the metaheuristic simulated annealing intelligent approach to incorporate randomness and uncertainties in performing the associated activities. A parametric analysis is conducted in order to quantify the system’s degree of accuracy. An actual case project is then utilized to illustrate its numerical capabilities. Generating accurate linear schedules for heavy earthmoving operations at the conceptual design stage is anticipated to be of major significance to infrastructure project stakeholders, engineers, and construction managers by detecting schedule’s conflicts early in order to enhance overall operational logistics.

scholarly journals An expert system to optimize cost and schedule of heavy earthmoving operations for earth- and rock- filled dam projects

2015 ◽  
Vol 23 (2) ◽  
pp. 222-231 ◽  
Author(s):  
Nizar MARKIZ ◽  
Ahmad JRADE
Keyword(s):  
Construction Projects ◽  
Stochastic Scheduling ◽  
Successful Implementation ◽  
Dam Construction ◽  
Embankment Dams ◽  
Knowledge Based ◽  
Heavy Equipment ◽  
Early Design Stages ◽  
Linear Schedules ◽  
Line Of Balance

Success of major embankment dam construction projects is measured by the enormity of optimizing costs and schedules of selected heavy equipment based on their operational analyses. In this paper, the main objective is geared towards developing a knowledge-based decision support system for optimizing costs of heavy earthmoving operations and corresponding linear schedules at early design stages. Also, the proposed system is capable of generating an auto­mated linear schedule based on stochastic scheduling techniques. Thus, a meta-heuristic simulated approach utilizing a metropolis algorithm is implemented to assist in generating optimized line-of balances. The successful implementation of the proposed system will provide the user with optimum fleet of equipment for performing earthwork operations and linear scheduling for strategic planning purposes. Towards the end, an actual dam construction project is utilized to numerically validate the proposed system and quantify its degree of accuracy. Results presented in this study are an­ticipated to be of major significance to owners, designers, and construction managers specialized in embankment dams heavy earthmoving operations and would contribute to the database of fleet management systems by incorporating a novel system that integrates heavy equipment economical operational analyses with its corresponding line of balance.

Research on Effect Chain Model with Prolog

2011 ◽  
Vol 421 ◽  
pp. 578-581
Author(s):  
Huan Huan Su ◽  
Chang Qing Gao ◽  
Bo Yang ◽  
Bing Lv
Keyword(s):  
Life Cycle ◽  
Expert System ◽  
Problem Solving ◽  
Conceptual Design ◽  
Expert Knowledge ◽  
Design Stage ◽  
Chain Model ◽  
Innovative Design ◽  
Problem Solving Process ◽  
Reasoning Mechanism

Conceptual design is the most innovative stages in the life cycle of product development, and effect is the solving tools of TRIZ based on knowledge. The use of effects to solve the problem of conceptual design stage can improve the efficiency of Innovative design and competitiveness of enterprises. The problem-solving process of effects applied was described in this paper. In PROLOG environment, the knowledge representation was used to write the effect as expert knowledge base, and then the reasoning mechanism was used to make a simple expert system of effect. It also can be used to help designers check and resolve the design issues more conveniently.

Optimizing the scheduling of crew deployments in repetitive construction projects under uncertainty

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Abbas Hassan ◽  
Khaled El-Rayes ◽  
Mohamed Attalla
Keyword(s):  
Construction Projects ◽  
Design Methodology ◽  
Real Life ◽  
Stochastic Scheduling ◽  
Content Type ◽  
Project Duration ◽  
Trade Offs ◽  
Original Contribution ◽  
Novel Model ◽  
Scheduling Technique

PurposeThis paper presents the development of a novel model for optimizing the scheduling of crew deployments in repetitive construction projects while considering uncertainty in crew production rates.Design/methodology/approachThe model computations are performed in two modules: (1) simulation module that integrates Monte Carlo simulation and a resource-driven scheduling technique to calculate the earliest crew deployment dates for all activities that fully comply with crew work continuity while considering uncertainty; and (2) optimization module that utilizes genetic algorithms to search for and identify optimal crew deployment plans that provide optimal trade-offs between project duration and crew deployment plan cost.FindingsA real-life example of street renovation is analyzed to illustrate the use of the model and demonstrate its capabilities in optimizing the stochastic scheduling of crew deployments in repetitive construction projects.Originality/valueThe original contribution of this research is creating a novel multiobjective stochastic scheduling optimization model for both serial and nonserial repetitive construction projects that is capable of identifying an optimal crew deployment plan that simultaneously minimizes project duration and crew deployment cost.

Methodology to Support a Collaborative DFX Process with Integration of PDM and Expert System Tools

2008 ◽  
Vol 44-46 ◽  
pp. 381-388 ◽  
Author(s):  
E.D. Ramón-Raygoza ◽  
David A. Guerra-Zubiaga ◽  
M. Tomovic
Keyword(s):  
Knowledge Management ◽  
Expert System ◽  
Cost Reduction ◽  
Product Innovation ◽  
Design Stage ◽  
Product Lifecycle ◽  
New Approach ◽  
Collaborative Environment ◽  
Knowledge Types ◽  
Product Realization

Designers need to reuse relevant knowledge types to make important decisions. These decisions are based not only on experience, but also on key knowledge global partners. A methodology to support information-knowledge management for global collaboration using DFX, PDM and Expert System tools is proposed. This new approach shows a manner to provide information from each stage of the product lifecycle to the designers through a PDM system. In addition, it includes a manner to store and share the knowledge created during the DFX process using an Expert System. This methodology provides integration to product realization technologies while supporting design stage in a collaborative environment when a large amount of information and knowledge to get a decision is required. The new approach implemented provides important benefits such as launching time and cost reduction, increased efficiency of designers and product innovation.

scholarly journals Vertical lateral load resisting elements for low to medium rise buildings

1993 ◽  
Vol 26 (3) ◽  
pp. 356-366 ◽  
Author(s):  
A. W. Charleson
Keyword(s):  
New Zealand ◽  
Expert System ◽  
Seismic Design ◽  
Structural Information ◽  
Lateral Load ◽  
Design Stage ◽  
Structural Systems ◽  
Preliminary Design ◽  
Concrete Building ◽  
Preliminary Design Stage

This paper describes the development of a computer program for architects to provide guidance on wind and earthquake vertical lateral load resisting structure. The program, akin to an expert system, is suitable for designing low to medium-rise buildings in New Zealand at a preliminary design stage. Examples of design guides, providing more general lateral load resisting structural information for commonly used structural systems and materials, appropriate to a preliminary design stage, are also presented. Application of the program to the seismic design of a four storey reinforced concrete building is discussed.

scholarly journals Line of Balance- A Contractor Friendly Scheduling Technique

2011 ◽  
Vol 3 (6) ◽  
pp. 162-163 ◽  
Author(s):  
Bhushan R.S Bhushan R.S ◽  
◽  
Prof. V. Srinivasa Raghavan
Keyword(s):  
Line Of Balance ◽  
Scheduling Technique
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