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Abuwarda, Z and Hegazy, T (2016) Flexible Activity Relations to Support Optimum Schedule Acceleration. Journal of Construction Engineering and Management, 142(11).

  • Type: Journal Article
  • Keywords: Construction; Schedule crashing; Overlapping; Constraint programming; Optimization; Resource constraints; Cost and schedule;
  • ISBN/ISSN: 0733-9364
  • URL: https://doi.org/10.1061/(ASCE)CO.1943-7862.0001193
  • Abstract:
    In construction schedules, a logical relationship between two activities is specified by the relationship type and a fixed lag time. This rigid representation, however, does not consider the situation when two activities have a degree of flexibility in their relationship. Such flexibility, or soft relation, can be very beneficial as it provides a range of overlapping options that can be utilized in situations that require the schedule to be optimally accelerated. This paper thus proposes a formalization of a generic logical relationship (hard or soft) of any type (finish-to-start, etc.) between any two activities. Using the generic representation, modified activity start and finish time computations are presented to accommodate the overlaps associated with soft relations, and are used in a schedule-crashing model. The model determines the optimum combination of activity crashing and overlapping decisions that minimizes project cost without violating the resource constraints. The new activity relationship and crashing model are beneficial to both researchers and practitioners as they facilitate schedule optimization decisions for projects that exercise a good level of overlapping, such as fast-track projects.

Bayram, S and Al-Jibouri, S (2016) Efficacy of Estimation Methods in Forecasting Building Projects’ Costs. Journal of Construction Engineering and Management, 142(11).

Brockmann, C, Brezinski, H and Erbe, A (2016) Innovation in Construction Megaprojects. Journal of Construction Engineering and Management, 142(11).

Carretero-Ayuso, M J, García-Sanz-Calcedo, J and Reyes-Rodríguez, A M (2016) Qualitative and Quantitative Analyses on Project Deficiencies in Flat-Roof Design in Extremadura, Spain. Journal of Construction Engineering and Management, 142(11).

Chancellor, W and Lu, W (2016) A Regional and Provincial Productivity Analysis of the Chinese Construction Industry: 1995 to 2012. Journal of Construction Engineering and Management, 142(11).

Gardner, B J, Gransberg, D D and Jeong, H D (2016) Reducing Data-Collection Efforts for Conceptual Cost Estimating at a Highway Agency. Journal of Construction Engineering and Management, 142(11).

Gosling, J, Pero, M, Schoenwitz, M, Towill, D and Cigolini, R (2016) Defining and Categorizing Modules in Building Projects: An International Perspective. Journal of Construction Engineering and Management, 142(11).

Lee, J (2016) Estimating Cumulative Damages due to Disruptions in Repetitive Construction. Journal of Construction Engineering and Management, 142(11).

Lee, Y, Kim, J and Lee, T S (2016) Topological Competiveness Based on Social Relationships in the Korean Construction-Management Industry. Journal of Construction Engineering and Management, 142(11).

Liang, C, Lu, W, Rowlinson, S and Zhang, X (2016) Development of a Multifunctional BIM Maturity Model. Journal of Construction Engineering and Management, 142(11).

Love, P E D and Smith, J (2016) Toward Error Management in Construction: Moving beyond a Zero Vision. Journal of Construction Engineering and Management, 142(11).

Lv, X and El-Gohary, N M (2016) Discovering Context-Specific Integration Practices for Integrating NEPA into Statewide and Metropolitan Project Planning Processes. Journal of Construction Engineering and Management, 142(11).

O’Connor, J T, Choi, J O and Winkler, M (2016) Critical Success Factors for Commissioning and Start-Up of Capital Projects. Journal of Construction Engineering and Management, 142(11).

Rodríguez-Garzón, I, Martínez-Fiestas, M, Delgado-Padial, A and Lucas-Ruiz, V (2016) An Exploratory Analysis of Perceived Risk among Construction Workers in Three Spanish-Speaking Countries. Journal of Construction Engineering and Management, 142(11).

Seo, J, Lee, S and Seo, J (2016) Simulation-Based Assessment of Workers’ Muscle Fatigue and Its Impact on Construction Operations. Journal of Construction Engineering and Management, 142(11).

Zhou, H W, Zhou, Y H and Zhao, C J (2016) Fault-Response Mechanism of Production System in Concrete-Dam-Construction Simulation. Journal of Construction Engineering and Management, 142(11).