Welcome
Digital library of construction informatics
and information technology in civil engineering and construction
 

Works 

Search Results

Facilitated by the SciX project

Hits 1 to 5 of 5

Can Ersen F?rat, Juhani Kiiras, Kalle Kähkönen, Pekka Huovinen

Model based scheduling in building projects – is it oxymoron?

Abstract: In building, most projects are still planned and scheduled based on the randomly accumulated, contextual experience among planners and managers. The key inputs for scheduling tasks, i.e. the dependencies, man-hours, and durations of activities may have never been organized well in the focal planner’s mind. The aim of the paper is to intro-duce some new viable ways of modeling scheduling activities in the context of building based on the integration of a product model, a process model, and complementary IT solutions. The integrative rationale of the new Building Con-struction Information Model (BCIM) is herein justified in terms of combining the building product model, the building construction resource and cost model, and the building construction process model. Some new feasible ways of auto-mating building project planning are explored, in particular in terms of using template schedules to automate schedul-ing activities as part of the advancement and exploitation of the suggested BCIM.

Keywords: building projects, information technology, modeling, process models, product models, scheduling

DOI:

Full text: content.pdf (759,119 bytes) (available to registered users only)

Series: w78:2007 (browse)
Cluster:
Class:
Similar papers:
Sound: N/A.


Couzens A, Thorpe T, Skitmore M

Executive information system for construction contract ridding decisions

Abstract: This paper describes the development of an integrated Executive Information System (EIS) for supporting construction executives and senior managers strategic information requirements. The system focuses on the provision of organisational and external market information for contract bidding decisions. The system uses a proprietary microcomputer based EIS development environment to access ' synthetic ' data structures representing the LAN architecture of a typical construction firm. This paper explains the theory and technologies related to the development of such systems. This is followed by a general discussion of the analysis techniques adopted for development and definition of the system. The bulk of the paper relates to a description of the proposed prototype system and its application. The system itself serves as a nucleus for access to a variety of data providing strategic information for contract bidding decisions. The development methodologies and the resulting prototype serve as a template for development of similar EIS and Visual Information Access (VIA) systems in a wider executive and senior manager information support role.

Keywords: contract bidding; tender adjudication; strategic information; executive support system; information scanning

DOI:

Full text: content.pdf (971,598 bytes) (available to registered users only)

Series: w78:1993 (browse)
Cluster:
Class:
Similar papers:
Sound: read aloud.

Permission to reproduce these papers has been graciously provided by the National University of Singapore. The assistance of the editors, particularly Prof. Martin Betts, is gratefully appreciated.


Fischer M A, Luiten G T B, Aalami F

Representing project information and construction method knowledge for computer- aided construction management

Abstract: Currently available construction management software has serious limitations that hinder further integration and automation of construction management tasks. The main limitation is the low level at which project information and knowledge is represented. This means that integration of design and construction planning information and automated reasoning about, for example, planning, are difficult to implement. In two research projects at the Center for Integrated Facility Engineering at Stanford University, we are addressing these limitations. In the SPACECAKE project we propose a higher level representation of project information that explicitly represents the relations between products, activities, construction methods and resources. A prototype system shows that it is possible to implement our conceptual model and support project management decisions. In the MOCA project we elaborate further on the representation of construction method knowledge. In this paper we propose a template to make the knowledge explicit and computer-interpretable.

Keywords:

DOI:

Full text: content.pdf (1,466,181 bytes) (available to registered users only)

Series: w78:1995 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.synthesis (0.016915) class.bestPractise (0.009748) class.software development (0.008872)
Similar papers:
Sound: read aloud.

Permission to reproduce these papers has been graciously provided by the Stanford University, USA. The support of the editors, particularly Prof. Fischer is gratefully appreciated.


Karhu, Vesa

A generic construction process modelling method

Abstract: A variety of modelling methods has been used to model construction processes and projects, either during normal project planning or for process re-engineering efforts or research. One common method, which is widely used by construction industry practitioners, is scheduling. In addition to schedules, some companies have used a simple box-and-arrow method, which graphically resembles schedules, for analysing their working processes. More formal methods such as IDEF0 have been used in re-engineering projects and by researchers. All these methods are limited in scope and cannot be used to model all the aspects of the processes that practitioners are interested in. A new generic construction process modelling method, GEPM, was developed to overcome the deficiencies of the current methods. GEPM uses object-oriented principles, and has borrowed features, such as activity, task, and temporal dependency, from methods like IDEF0 and scheduling. GEPM is flexible in the sense that the conceptual model can be changed to achieve additional special features. This capability is also supported by the database implementation, which enables users to interact with the developed process models through views that represent partial models. The views support the IDEF0, scheduling, and simple flow methods. There are, though, rules for how to convert between the partial models through views. The evaluation of GEPM showed that more modelling features, i.e. modelling power, are obtained in comparison with the earlier methods. One of the essential features of GEPM is the distinction between activities and tasks. Activities define how an action will be carried out, generally using predetermined inputs to achieve a predetermined output, whereas tasks are activities with additionally specified starting and finishing times, duration and location. Moreover, a task has a type-attribute that refers to an activity where its overall template is defined. Before the actual evaluation, case material from a real project was preliminarily tested with GEPM along with the prototype application. It turned out that some additions were needed to the conceptual model of GEPM and to the prototype application. GEPM can be used for process improvement, process management, and for enhancing communication in a construction process. One usage scenario for GEPM is to define quality systems and reference models, using the activity sub-model and storing the results in the GEPM database. A project-specific model can be derived from the reference model using conversion rules, and it eventually turns into a project specific-schedule with tasks.

Keywords: Process model, IDEF0, Construction

DOI:

Full text: content.pdf (1,077,347 bytes) (available to registered users only)

Series: other (browse)
Cluster:
Class:
Similar papers:
Sound: N/A.


Raimar J.Scherer, Wael Sharmak

Generic Process Template Description for the Effect of Risks on Project Schedule

Abstract: Many factors impact construction projects and cause changes in the project management plans. These factors can be considered as risks which are impossible to be identified completely in early project stages. Therefore, risk management in construction requires proactive as well as reactive procedures. Risk treatment, among the other risk management subprocesses, has the concrete change action which may modify one or more of the project management plans. In this paper, process modeling techniques are used to describe risk treatment effect on the structure of the project schedule plan. This structural change description is introduced as formalized configurable treatment templates. According to our findings seven generalized templates are efficient to represent the risk part in project reference models concerning process changes which in turn can be tailored and assembled to form up-to-date schedule plans. This kind of risk representation in reference repository will serve as means of knowledge management by providing all risk-related available information as response to a critical event. The Event-driven process Chains (EPC) will be used to model risk treatment templates using normal and configurable EPC elements.

Keywords: Process Modeling, Risk Treatment, Configuration, EPC

DOI:

Full text: content.pdf (456,963 bytes) (available to registered users only)

Series: w78:2008 (browse)
Cluster:
Class:
Similar papers:
Sound: N/A.


No more hits.

 

hosted by University of Ljubljana



includes

W78




© itc.scix.net 2003
Home page of this database login Powered by SciX Open Publishing Services 1.002 February 16, 2003