Formalization of Construction Sequencing Rationale and Classification Mechanism to Support Rapid Generation of Sequencing Alternatives

TitleFormalization of Construction Sequencing Rationale and Classification Mechanism to Support Rapid Generation of Sequencing Alternatives
Publication TypeTechnical Report
AuthorsKoo, B., M. Fischer, and J. Kunz
NumberTR167
Date Published10/2006
Abstract

The ability to re-sequence activities is a critical task for project planners for effective project control. Re-sequencing activities requires planners to determine the impact or “role” an activity has on following activities. They also need to determine which activities may or may not be delayed. Distinguishing the role and “status” (i.e., whether an activity may be delayed) of activities in turn requires planners to understand the rationale for activity sequences. The current CPM framework, however, only distinguishes activities with respect to their time-criticality and represents sequencing rationale using precedence relationships. Planners thus find it difficult to keep track of individual sequencing logic, and manually inferring the role and status of activities becomes practically prohibitive in complex project schedules. The research introduced in this paper addresses the limitation of the CPM framework by formalizing a constraint ontology and classification mechanism. The ontology allows planners to describe their rationale for activity sequences in a consistent and intuitive way, while the classification mechanism leverages the ontology to automatically infer the role and status of activities. Using a prototype tool, users can instantly verify which activities to delay to expedite critical milestone or bottleneck activities, thus making it possible to quickly evaluate and generate sequencing alternatives in CPM-based schedules.

KeywordsComputer Aided Scheduling, Constraint Modeling, Construction Management, Critical Path Method, Planning, Process Models
Year of Publication2006
AttachmentSize
TR167.pdf1.34 MB

Last modified Tue, 22 Mar, 2011 at 15:22