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Al Qady, M and Kandil, A (2013) Document Management in Construction: Practices and Opinions. Journal of Construction Engineering and Management, 139(10).
da Rocha, C G and Kemmer, S L (2013) Method to Implement Delayed Product Differentiation in Construction of High-Rise Apartment Building Projects. Journal of Construction Engineering and Management, 139(10).
Deng, F and Smyth, H (2013) Contingency-Based Approach to Firm Performance in Construction: Critical Review of Empirical Research. Journal of Construction Engineering and Management, 139(10).
Gerber, B and Ekenel, M (2013) Building Code Requirements for Inspection of Adhesive Anchors in Concrete. Journal of Construction Engineering and Management, 139(10).
Hallowell, M R, Hinze, J W, Baud, K C and Wehle, A (2013) Proactive Construction Safety Control: Measuring, Monitoring, and Responding to Safety Leading Indicators. Journal of Construction Engineering and Management, 139(10).
Hanna, A, Boodai, F and El Asmar, M (2013) State of Practice of Building Information Modeling in Mechanical and Electrical Construction Industries. Journal of Construction Engineering and Management, 139(10).
Hinze, J, Hallowell, M and Baud, K (2013) Construction-Safety Best Practices and Relationships to Safety Performance. Journal of Construction Engineering and Management, 139(10).
Lei, Z, Taghaddos, H, Olearczyk, J, Al-Hussein, M and Hermann, U (2013) Automated Method for Checking Crane Paths for Heavy Lifts in Industrial Projects. Journal of Construction Engineering and Management, 139(10).
Martek, I and Chen, C (2013) Localization Typologies Evident among Foreign Enterprises Active in the Chinese Construction Market. Journal of Construction Engineering and Management, 139(10).
Minchin, R E, Li, X, Issa, R R and Vargas, G G (2013) Comparison of Cost and Time Performance of Design-Build and Design-Bid-Build Delivery Systems in Florida. Journal of Construction Engineering and Management, 139(10).
Russell, M M, Howell, G, Hsiang, S M and Liu, M (2013) Application of Time Buffers to Construction Project Task Durations. Journal of Construction Engineering and Management, 139(10).
- Type: Journal Article
- Keywords: Construction management; Uncertainty principles; Time factors; Construction; Time; Buffer; Uncertainty; Labor and personnel issues;
- ISBN/ISSN: 0733-9364
- URL: https://doi.org/10.1061/(ASCE)CO.1943-7862.0000735
- Abstract:
For this research, a time buffer is defined as the extra time added during planning to individual task durations to compensate for uncertainty and protect against workflow variation to assure a predictable hand-off to subsequent crews. Although previous research has acknowledged this addition of time buffers, their use in practice has not been studied. This paper reports on what causes people to add and size time buffers. A nationwide survey was administered to project managers, superintendents, and foremen to identify the most frequent and severe reasons for adding time buffers to construction task durations. Forty-seven buffer factors were grouped into nine categories: project characteristics, prerequisite work, detailed design/working method, labor force, tools and equipment, material and components, work/jobsite conditions, management/supervision/information flow, and weather. Contributions to the body of knowledge include (1) identifying the 12 most frequent and severe causes of time buffer; (2) analyzing (understanding) how buffers are viewed differently by foremen, superintendents, and project managers, between trades and between general contractors and subcontractors, and the perception among different levels of experience; and (3) investigating how companies that do not regularly use the Last Planner System and those that do view those factors differently. Additionally, the research quantitatively developed risk profiles of the buffer factors through an integrated risk assessment approach. Understanding the application of time buffers and their associated frequency and severity will help construction managers address potential problem areas and inefficiencies in a prioritized manner.
Valdes-Vasquez, R and Klotz, L E (2013) Using the Concept-Mapping Method for Empirical Studies in Construction Research. Journal of Construction Engineering and Management, 139(10).
Wagner, H, Kim, A J and Gordon, L (2013) Relationship between Personal Protective Equipment, Self-Efficacy, and Job Satisfaction of Women in the Building Trades. Journal of Construction Engineering and Management, 139(10).
Wanberg, J, Harper, C, Hallowell, M R and Rajendran, S (2013) Relationship between Construction Safety and Quality Performance. Journal of Construction Engineering and Management, 139(10).
Yuventi, J, Levitt, R and Robertson, H (2013) Organizational Barriers to Productivity and Innovation in Large-Scale, U.S.-Based Photovoltaic System Construction Projects. Journal of Construction Engineering and Management, 139(10).
Zhang, L, Pan, C and Zou, X (2013) Criticality Comparison between the Repetitive Scheduling Method and the Network Model. Journal of Construction Engineering and Management, 139(10).