A mixed (continuous + discrete) time-cost trade-off model considering four different relationships with lag time

Jaeho Son, Taehoon Hong, Sangyoub Lee

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Numerous Time-Cost Trade-Off (TCTO) models have been developed to identify the best combination of time and cost in a critical path network. Although there are four relationships in the critical path network, most of the models developed so far have considered only the Finish-Start (F-S) relationship. Thus, an advanced TCTO model that considers all four relationships between activities was developed in this study to accurately present a project, and is presented in this paper. The model also takes into account the lag time between activities. Previous TCTO models minimize the total project cost based on the given crash scenario. Moreover, to enhance the practicality, the model was developed to work with various TCTO scenarios such as continuous, discrete, and even mixed (continuous + discrete). The combined scenario reflects the most realistic situation. Two independent scenarios cannot be combined without mathematical modifications since a rudimentary mixing of two scenarios may provide an incorrect solution. A new formulation technique is introduced to merge the two independent scenarios mathematically and it guarantees the optimal solution.

Original languageEnglish
Pages (from-to)281-291
Number of pages11
JournalKSCE Journal of Civil Engineering
Volume17
Issue number2
DOIs
Publication statusPublished - 2013 Apr 3

Fingerprint

Costs

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering

Cite this

@article{32a21245a0d5422da85f9c0b225b0221,
title = "A mixed (continuous + discrete) time-cost trade-off model considering four different relationships with lag time",
abstract = "Numerous Time-Cost Trade-Off (TCTO) models have been developed to identify the best combination of time and cost in a critical path network. Although there are four relationships in the critical path network, most of the models developed so far have considered only the Finish-Start (F-S) relationship. Thus, an advanced TCTO model that considers all four relationships between activities was developed in this study to accurately present a project, and is presented in this paper. The model also takes into account the lag time between activities. Previous TCTO models minimize the total project cost based on the given crash scenario. Moreover, to enhance the practicality, the model was developed to work with various TCTO scenarios such as continuous, discrete, and even mixed (continuous + discrete). The combined scenario reflects the most realistic situation. Two independent scenarios cannot be combined without mathematical modifications since a rudimentary mixing of two scenarios may provide an incorrect solution. A new formulation technique is introduced to merge the two independent scenarios mathematically and it guarantees the optimal solution.",
author = "Jaeho Son and Taehoon Hong and Sangyoub Lee",
year = "2013",
month = "4",
day = "3",
doi = "10.1007/s12205-013-1506-3",
language = "English",
volume = "17",
pages = "281--291",
journal = "KSCE Journal of Civil Engineering",
issn = "1226-7988",
publisher = "Korean Society of Civil Engineers",
number = "2",

}

A mixed (continuous + discrete) time-cost trade-off model considering four different relationships with lag time. / Son, Jaeho; Hong, Taehoon; Lee, Sangyoub.

In: KSCE Journal of Civil Engineering, Vol. 17, No. 2, 03.04.2013, p. 281-291.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A mixed (continuous + discrete) time-cost trade-off model considering four different relationships with lag time

AU - Son, Jaeho

AU - Hong, Taehoon

AU - Lee, Sangyoub

PY - 2013/4/3

Y1 - 2013/4/3

N2 - Numerous Time-Cost Trade-Off (TCTO) models have been developed to identify the best combination of time and cost in a critical path network. Although there are four relationships in the critical path network, most of the models developed so far have considered only the Finish-Start (F-S) relationship. Thus, an advanced TCTO model that considers all four relationships between activities was developed in this study to accurately present a project, and is presented in this paper. The model also takes into account the lag time between activities. Previous TCTO models minimize the total project cost based on the given crash scenario. Moreover, to enhance the practicality, the model was developed to work with various TCTO scenarios such as continuous, discrete, and even mixed (continuous + discrete). The combined scenario reflects the most realistic situation. Two independent scenarios cannot be combined without mathematical modifications since a rudimentary mixing of two scenarios may provide an incorrect solution. A new formulation technique is introduced to merge the two independent scenarios mathematically and it guarantees the optimal solution.

AB - Numerous Time-Cost Trade-Off (TCTO) models have been developed to identify the best combination of time and cost in a critical path network. Although there are four relationships in the critical path network, most of the models developed so far have considered only the Finish-Start (F-S) relationship. Thus, an advanced TCTO model that considers all four relationships between activities was developed in this study to accurately present a project, and is presented in this paper. The model also takes into account the lag time between activities. Previous TCTO models minimize the total project cost based on the given crash scenario. Moreover, to enhance the practicality, the model was developed to work with various TCTO scenarios such as continuous, discrete, and even mixed (continuous + discrete). The combined scenario reflects the most realistic situation. Two independent scenarios cannot be combined without mathematical modifications since a rudimentary mixing of two scenarios may provide an incorrect solution. A new formulation technique is introduced to merge the two independent scenarios mathematically and it guarantees the optimal solution.

UR - http://www.scopus.com/inward/record.url?scp=84875485676&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84875485676&partnerID=8YFLogxK

U2 - 10.1007/s12205-013-1506-3

DO - 10.1007/s12205-013-1506-3

M3 - Article

AN - SCOPUS:84875485676

VL - 17

SP - 281

EP - 291

JO - KSCE Journal of Civil Engineering

JF - KSCE Journal of Civil Engineering

SN - 1226-7988

IS - 2

ER -