79 Hits in 1.9 sec

Visualization Techniques for Schedule Comparison

Dandan Huang, Melanie Tory, Sheryl Staub-French, Rachel Pottinger
2009 Computer graphics forum (Print)  
Co-Supervisor or Departmental Member [Enter Name (no signature) and Department] Departmental Member [Enter Name (no signature) and Department] Outside Member [Enter Name (no signature) and Department] Additional Member [Enter Name (no signature) and Department] Project schedules are effectively represented by Gantt charts, but comparing multiple versions of a schedule is difficult. To compare versions with current methods, users must search and navigate through multiple large documents, making
more » ... t difficult to identify differences. We present two novel visualization techniques to support the comparison of Gantt charts. First, we encode two Gantt charts in one view by overlapping them to show differences. Second, we designed an interactive visual technique, the 'TbarView', that allows users to compare multiple schedules within one single view. We evaluated the overlap and TbarView techniques via a user study. The study results showed that our design provided a quick overview of the variances among two or more schedules, and the techniques also improved efficiency by minimizing view switching. Our visual techniques for schedule comparison could be combined with other resource analysis tools to help project teams identify and resolve errors and problems in project schedules.
doi:10.1111/j.1467-8659.2009.01441.x fatcat:gdfgk5yiajejndezs365six3t4

Data Coordination: Supporting Contingent Updates

Michael K. Lawrence, Rachel Pottinger, Sheryl Staub-French
2011 Proceedings of the VLDB Endowment  
In many scenarios, a contingent data source may benefit by coordinating with external heterogeneous sources upon which it depends. The administrator of this contingent source needs to update it when changes are made to the external base sources. For example, when a building design is updated, the contractor's cost estimate must be updated, too. The goal of data coordination is to update a contingent source, C, based on changes to an independently maintained base source, B. This paper introduces
more » ... a data coordination system which allows C to coordinate its data without imposing significant requirements on B. Our system uses declarative mappings between B and C and performs coordination in two stages View Differencing -finding changes to an intermediate view of B based on its mapping to C, and Update Translation -translating the view differencing result into updates on C. We present and evaluate novel solutions to both stages and demonstrate their feasibility on real world problems.
dblp:journals/pvldb/LawrencePS11 fatcat:zl3vhvotsbexnegmwygm5symxa

Linear Scheduling and 4D Visualization

Sheryl Staub-French, Alan Russell, Ngoc Tran
2008 Journal of computing in civil engineering  
, Staub-French and Fisher 2001 , Heesom and Mahdjuobi 2004) .  ...  , Staub-French and Fisher 2001 , Heesom and Mahdjuobi 2004) .  ...  Staub-French, S., and Fischer, M., (2001) •is.  ... 
doi:10.1061/(asce)0887-3801(2008)22:3(192) fatcat:eh5nhh64njau3pjtzqde6vjpla

Improving the usability of standard schemas

Jiemin Zhang, April Webster, Michael Lawrence, Madhav Nepal, Rachel Pottinger, Sheryl Staub-French, Melanie Tory
2011 Information Systems  
Due to the development of XML and other data models such as OWL and RDF, sharing data is an increasingly common task since these data models allow simple syntactic translation of data between applications. However, in order for data to be shared semantically, there must be a way to ensure that concepts are the same. One approach is to employ commonly used schemas -called standard schemas -which help guarantee that syntactically identical objects have semantically similar meanings. As a result
more » ... the spread of data sharing, there has been widespread adoption of standard schemas in a broad range of disciplines and for a wide variety of applications within a very short period of time. However, standard schemas are still in their infancy and have not yet matured or been thoroughly evaluated. It is imperative that the data management research community takes a closer look at how well these standard schemas have fared in real-world applications to identify not only their advantages, but also the operational challenges that real users face. In this paper, we both examine the usability of standard schemas in a comparison that spans multiple disciplines, and describe our first step at resolving some of these issues in our Semantic Modeling System. We evaluate our Semantic Modeling System through a careful case study of the use of standard schemas in Architecture, Engineering, and Construction, which we conducted with domain experts. We discuss how our Semantic Modeling System can help the broader problem and also discuss a number of challenges that still remain.
doi:10.1016/ fatcat:5dgkuwhdirgtzht7i4snzim4se

A generic feature-driven activity-based cost estimation process

Sheryl Staub-French, Martin Fischer, John Kunz, Boyd Paulson
2003 Advanced Engineering Informatics  
Staub-French et al. [22] describes the specific details of the feature ontology and the mechanisms implemented to generate project-specific feature-based product models.  ... 
doi:10.1016/s1474-0346(03)00017-x fatcat:kcgkxs7aqffeljk2wckjfbxgz4

Supporting Knowledge-Intensive Construction Management Tasks in BIM

Madhav Prasad Nepal, Sheryl Staub-French
2016 Journal of Information Technology in Construction  
et al., 2003) ; and • Influence the installation sequence, safety, coordination, operation and maintenance of mechanical systems (Korman et al., 2003; Tabesh & Staub-French, 2006) .  ...  et al. (2003) ; Smith & Hanna (1993) ; Bisharat (2004) Wall curvature Staub-French et al. (2003) ; Peurifoy & Oberlender (1996) Existence of wall corbels, ledges, and pilasters Thomas & Zavrski  ... 
dblp:journals/itcon/NepalS16 fatcat:5t2cvlhgqjh7bcu6tb76lejj5y

Creating flexible mappings between Building Information Models and cost information

Michael Lawrence, Rachel Pottinger, Sheryl Staub-French, Madhav Prasad Nepal
2014 Automation in Construction  
During the early design stages of construction projects, accurate and timely cost feedback is critical to design decision making. This is particularly challenging for cost estimators, as they must quickly and accurately estimate the cost of the building when the design is still incomplete and evolving. State-of-the-art software tools typically use a rule-based approach to generate detailed quantities from the design details present in a building model and relate them to the cost items in a cost
more » ... estimating database. In this paper, we propose a generic approach for creating and maintaining a cost estimate using flexible mappings between a building model and a cost estimate. The approach uses queries on the building design that are used to populate views, and each view is then associated with one or more cost items. The benefit of this approach is that the flexibility of modern query languages allows the estimator to encode a broad variety of relationships between the design and estimate. It also avoids the use of a common standard to which both the designers and estimators must conform, allowing the estimator added flexibility and functionality to their work.
doi:10.1016/j.autcon.2014.05.006 fatcat:6id732ebpfekpj3clufx7xn75u

Coordination of data in heterogenous domains

Michael Lawrence, Rachel Pottinger, Sheryl Staub-French
2010 2010 IEEE 26th International Conference on Data Engineering Workshops (ICDEW 2010)  
Existing semantic integration approaches to coordinating data do not meet the needs of real world scenarios which contain fine-grained relationships between data sources. In this paper, we describe extensions to the popular GLAV mapping formalism to express such relationships. We outline methods for solving the data coordination problem using these mappings, and discuss future research problems for data coordination to be realized in heterogeneous domain scenarios that occur in practice.
doi:10.1109/icdew.2010.5452757 dblp:conf/icde/LawrencePS10 fatcat:pwvjkloiq5gypjnlww7pp44254

Levels of BIM compliance for model handover

Hasan B. Cavka, Sheryl Staub-French, Erik A. Poirier
2018 Journal of Information Technology in Construction  
The important process of design review, compliance checking and project handover information intake and processing have traditionally been paper based and manual tasks. These tasks are onerous and error prone. Moreover, they do not allow effective detection of design issues and validation of project information quality for handover which lead to waste of resources when performing maintenance and repairs during operations. Building Information Modeling has the potential to help owners overcome
more » ... ese challenges by enabling seamless exchange of project information between design, construction, and operations while supporting and proving opportunities for automated design reviews. However, this practice has yet to fully take root in the industry due to its relative novelty. The research project presented in this paper set out to understand how owners could adopt and implement BIM to support design and information handover review. Two large public owner organizations were investigated over five years to support this aim. The findings are articulated around three levels of compliance for the owner's project and BIM requirements. The findings on compliance review suggest three elements: model structure verification, model content verification and design compliance review. These three elements rely on model queries which are identified through investigation of owner's operational requirements. The presented research connects modeling practice to support facilities maintenance, owner's information requirements, and owner's design requirements and leverages this information for model based compliance review.
dblp:journals/itcon/CavkaSP18 fatcat:m7e5xhaxqje4zji43ypdz5fooi

Querying a building information model for construction-specific spatial information

Madhav Prasad Nepal, Sheryl Staub-French, Rachel Pottinger, April Webster
2012 Advanced Engineering Informatics  
This is the author's version of a work that was submitted/accepted for publication in the following source: Nepal, Madhav Prasad, Staub-French, Sheryl, Pottinger, Rachel, & Webster, April (2012) Querying  ... 
doi:10.1016/j.aei.2012.08.003 fatcat:d5q4dbcgxvhz3pexsmuutcfcqu

Reasoning about component similarity in building product models from the construction perspective

Sheryl Staub-French, Madhav Prasad Nepal
2007 Automation in Construction  
Identifying the design features that impact construction is essential to developing cost effective and constructable designs. The similarity of building components is a critical design feature that affects method selection, productivity, and ultimately construction cost and schedule performance. However, there is limited understanding of what constitutes similarity in the design of building components and limited computer-based support to identify this feature in a building product model. This
more » ... aper contributes a feature-based framework for representing and reasoning about component similarity that builds on ontological modeling, model-based reasoning and cluster analysis techniques. It describes the ontology we developed to characterize component similarity that represents the building component, the component attributes, the direction, the range of acceptable variation for geometric attributes, and the degree of variation required to assess component similarity. It also describes the generic reasoning process we formalized to identify component similarity in a standard product model based on practitioners' varied preferences. The generic reasoning process evaluates the geometric, topological, and symbolic similarities between components, creates groupings of similar components, and quantifies the degree of similarity. We implemented this reasoning process in a prototype cost estimating application, which creates and maintains cost estimates based on a building product model. Validation studies of the prototype system provide evidence that the framework is general and enables a more accurate and efficient cost estimating process. CAD, Ontology, Model-based reasoning, Feature recognition, Cluster analysis and computer-interpretable. We represent component similarity as a product feature of a building product model and use feature recognition to infer its existence in a standard product model. This paper describes the ontology we developed to represent component similarity, and the generic reasoning process we formalized to evaluate the degree of similarity in a given design. The ontology formalizes a feature-based representation of building component similarity that represents the building component, the component attributes, the direction, the range of acceptable variation for geometric attributes, and the degree of variation required to assess component similarity. The generic reasoning process leverages this project-independent representation to assess the degree of similarity in a given product model based on user-defined criteria. This three step reasoning process employs model-based reasoning and cluster analysis techniques to evaluate the geometric, topological, and symbolic similarities between components, create groupings of similar components, and quantify the degree of similarity. We implemented this reasoning process in a prototype cost estimating application, Activity-based Cost Estimating (ACE), which creates and maintains cost estimates based on a building product model. The system identifies relevant cost-incurring design features, including building component similarity, and adjusts the labor productivity rates and construction methods accordingly to calculate the construction cost. The following section describes a case study that illustrates different practitioners' criteria for specifying component similarity. Subsequent sections describe the ontology, the reasoning process, and the prototype implementation. Finally, the specific validation studies conducted to date will be discussed.
doi:10.1016/j.autcon.2007.02.013 fatcat:xydmeppva5eurieqh6lw6h5ssm

Construction Quality Assessment Using 3D as-built Models Generated with Project Tango

T. Sri Kalyan, Puyan A. Zadeh, Sheryl Staub-French, Thomas M. Froese
2016 Procedia Engineering  
Assessing the quality of construction for compliance with the design intent has been a challenging task in the AEC (Architecture, Engineering, and Construction) industry. As modern design methods using Building Information Modeling (BIM) techniques have been increasingly adopted by the AEC industry, construction quality assessment using BIM has become a challenging new task for practitioners. In the past few years, 3D as-built models for construction quality assessment have been developed using
more » ... data acquisition techniques like 3D laser scanning and photogrammetry. However, certain limitations like non-affordability, requiring expertise to operate, and dependence on time-consuming processes are restricting their usage for construction quality control purposes. The main objective of this work is to study the applicability of using a new, affordable, easy to use, and faster modeling technology (Project Tango) to produce 3D as-built models for facilitating the construction quality control process. For this purpose, a construction project was chosen as a case study and three different scenarios (including interior and exterior environments) were modelled using Project Tango. A post-processing method was developed to prepare the scanned as-built models for comparison with the design BIM. The accuracy level of these as-built models were also evaluated using dimension accuracy analysis. The prepared as-built models and the design BIM were then integrated and adjusted in the Autodesk Navisworks environment to perform the quality control assessment. This assessment process includes object completeness testing and spatial deviation analyses. This research thus highlights both the advantages and limitations of Project Tango and shows that such technologies have a great potential for construction quality assessments.
doi:10.1016/j.proeng.2016.04.178 fatcat:rtyd6keiencrhndcunz2bhta2q

Physical and Digital Artifact-Mediated Coordination in Building Design

Melanie Tory, Sheryl Staub-French, Barry A. Po, Fuqu Wu
2008 Computer Supported Cooperative Work (CSCW)  
Digital 3D models offer several potential advantages, including fewer design conflicts and errors (Staub-French and Fischer 2001; Khanzode et al. 2005) , improved data access and integration (Kam et  ... 
doi:10.1007/s10606-008-9077-4 fatcat:zfxqce54vvdqrizqsrajvobnmy

BIM-CITYGML data integration for modern urban challenges

Puyan A. Zadeh, Lan Wei, Arianne Dee, Rachel Pottinger, Sheryl Staub-French
2019 Journal of Information Technology in Construction SUMMARY: Modern cities require innovative urban design and development approaches that are efficiently tailored for neighborhood needs.  ... 
dblp:journals/itcon/ZadehWDPS19 fatcat:2qybizcaybhrlek6gxtpwg2hmy

A feature ontology to support construction cost estimating

2003 Artificial intelligence for engineering design, analysis and manufacturing  
We created another software prototype called Activity-based Cost Estimating (ACE) that uses the estimator-focused featurebased product model to generate and maintain construction cost estimates (Staub-French  ...  In ACE, we implemented a formal process that automatically customizes activities and resources when generating and maintaining cost estimates for estimatorfocused feature-based product models (Staub-French  ... 
doi:10.1017/s0890060403172034 fatcat:aqpdncwt55daphysrq4rk6mp5y
« Previous Showing results 1 — 15 out of 79 results