CPM Schedule Summarizing Function of the Beeline Diagramming Method

Kim, Seon-Gyoo

doi:10.3130/jaabe.11.367

Cited by 29 publications

(29 citation statements)

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“…Therefore, the efficiency of construction planning has become a main factor in a project's success or failure (Shin et al 2006). In order to achieve the systematic planning and management of a project, a network-based planning technique such as the Critical Path Method (CPM) is currently being used in the construction industry (Kim 2012). Proper selection of crews, equipment, and construction methods must be reviewed and determined to utilize CPM more efficiently.…”

Section: Introduction 11 Background and Purpose Of The Researchmentioning

confidence: 99%

New Time-Cost Trade-Off Model Considering the Sequence of Alternatives Between Activities

Kang

Son

Lee

2015

Journal of Asian Architecture and Building Engineering

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Many studies related to discrete Time-Cost Trade-Off models have been conducted with the goal of optimizing the total construction cost. However, since the existing discrete Time-Cost Trade-Off models do not consider the sequence of the alternatives between activities, there are limitations concerning their practical applicability. Thus, this research develops a new Time-Cost Trade-Off model that considers the sequence of alternatives between activities. In addition, all of the possible relationships (FS, FF, SS, and SF) between activities are considered in the model to enhance its practicability. This new Time-Cost Trade-Off model is expected to make initial planning as efficient as possible.

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Section: Introduction 11 Background and Purpose Of The Researchmentioning

confidence: 99%

New Time-Cost Trade-Off Model Considering the Sequence of Alternatives Between Activities

Kang

Son

Lee

2015

Journal of Asian Architecture and Building Engineering

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“…In order to prevent a loop occurring for the two-way multiple overlapping relationships during the forward computation, the ESD of a successor should be calculated using a minimum lag value among the linkages between Activities A and B from the predecessors toward a successor. For instance, if the ESD of Activity B is calculated by a linkage "2-0" with a lag value "0" and a linkage "10-11" with a lag value "3" among the linkages from Activity A to Activity B, it is calculated as "10 + 2 -0 = 12" and "10 + 10 -11 = 9" for the two linkages, respectively, by the BDM forward calculation Equation (2) 1 [4].…”

Section: Forward Pass Computationmentioning

confidence: 99%

“…Kim [3] indicated that the efficacy of CPM network scheduling techniques has been proven for a number of construction projects and it is now recognized as a useful tool, but many project participants who are not construction managers, scheduling experts or original users continue to have difficulty in understanding and utilizing CPM techniques. Kim [4] pointed out that CPM process scheduling does not accurately reflect every activity at the construction site, and it is often difficult to visually and clearly recognize the construction progress status. Additionally, CPM techniques are not able to integrate activity and budget progresses effectively.…”

Section: Introductionmentioning

confidence: 99%

Practical Application of Two-Way Multiple Overlapping Relationships in a BDM Network

Kim¹

2016

JCEA

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Today, most construction projects in urban environments are complex high-rise buildings that present unique challenges, including local building ordinances and restrictions, adjoining public and residential areas, narrow sidewalks and streets, and underground utilities, all of which require extensive planning and tight schedules. A major problem facing such projects is to formulate realistic schedules that will make it possible to meet contractual completion dates with limited resources and budgets. The scheduling software products currently used in construction projects, which include Primavera P6, Microsoft Project, etc., are not actually applied as a scheduling tool in practical construction projects, which instead generally depend on Microsoft Excel or a bar-chart. This is because the existing scheduling programs cannot provide more user-oriented schedule format such as representing two-way multiple overlapping relationships. To overcome this deficiency, the BDM (beeline diagramming method) is proposed as a new networking technique in 2010. But two-way multiple overlapping relationships generate the loop in a conventional schedule computation process. This paper addresses the loop phenomenon of two-way multiple overlapping relationships in a BDM network as well as proposes the solutions of them, and then presents a practical application of two-way multiple overlapping relationships at a real project.

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“…This allows planners to control as many points during the execution phase as it thought to be necessary. To the best of our knowledge four seminal partly parallel works on point-to-point relations can be identified in the literature: Kim [8], [9] calls his new relations bee-line relations and the graphical representation Bee-line Diagram (BDM), Francis and Miresco [10], [11] call their new relations temporal functions and they call their graphical representation method chronographic approach. Plotnick [12] calls his method Relationship Diagramming method (RDM) using the term of 'event' for the internal points.…”

Section: Introductionmentioning

confidence: 99%

History and Some Latest Developments of Precedence Diagramming Method

Hajdu

2015

OTMCJ

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Although the birth of Precedence Diagramming Method (PDM)is not as radiant as of CPM or PERT, but it is definitely the prevailing scheduling technique of our times. This popularity is due to its modeling flexibility over other techniques and the easy-to-understand mathematical model behind the technique. However, even this technique has its own limitations; modeling overlapping activities in a proper way seems to be a never-ending debate. The reason of this can be found in the fundamentals of PDM technique; the four precedence relationships that form connections between the end-points of the activities, and the activities that are assumed to be continuous with constant production speed. These fundamentals of PDM have their own consequences to scheduling practice; it is more and more apparent among professionals that activity overlapping in PDM cannot be modeled adequately. Different solutions were proposed for solving this problem from the application of negative lag, through the combination of SS and FF relations to the fragmentation of activities. All these solutions have their shortcomings. Probably the fragmentation technique has led to the development of point-to-point type of relation that can connect any arbitrary points of the dependent activities. The objective of this paper is to analyze the pros and cons of different solutions that are used for modeling overlapped activities, then to show how newly defined point-to-point relations can be used for this purpose. Algorithms that handles point-to-point relations with minimal and maximal lags are also presented. The main finding of the paper is that newly developed point-topoint relations are better from theoretical and practical point of view than the solutions based on traditional precedence relationships, but they still cannot provide theoretically perfect solution for overlapping. This paper is the fully extended version of a paper building on the results already presented on the Creative Construction Conference [1].

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CPM Schedule Summarizing Function of the Beeline Diagramming Method

Cited by 29 publications

References 1 publication

New Time-Cost Trade-Off Model Considering the Sequence of Alternatives Between Activities

New Time-Cost Trade-Off Model Considering the Sequence of Alternatives Between Activities

Practical Application of Two-Way Multiple Overlapping Relationships in a BDM Network

History and Some Latest Developments of Precedence Diagramming Method

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