Essay On Rework

984 Words2 Pages

The literature review comprises of definition of rework, describing rework as waste in construction, identification of possible factors causing rework based on different rework models and comparison of percentage of cost of rework from previous research.

2.1 Definition of rework
Every construction project is unique in nature and problems occurred are unpredictable. A lot of activities are involved in one project. So rework cannot be avoidable. Rework & wastages is recognized as non-value adding items which affects the performance and productivity of construction projects (Alwi, 2002). There are various terms associated with rework such as non-conformance, quality deviations, quality failures and defects.
Rework is defined as the unnecessary effort of redoing an activity that was inaccurately done the first time (Love, 2002a). When a product or service does not meet the customer requirement, work has to be redone. Most of the time, rework occurred due to complicated characteristics of construction process. The major cause of rework is uncertainty generated by poor information flow.
CII (2001a) defined “field rework as activities that should be done many times and activities which result in undoing the work that is already performed.” Fayek et al. (2003) have modified the definition & defined “field rework as activities in the field that have to be done more than once in the field, or activities which remove work previously installed as part of the project regardless of source, where no change order has been issued and no change of scope has been identified by the owner.”
Rework is necessary when any part of building fails to meet customer requirements, or completed work does not conform to the contract documents.

2.2 Waste associ...

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...per work sequencing, improper work protection, lack of coordination

Oyewobi, L.O. and Ogunsemi, D.R. (2010) Quality failure, Lack of understanding and correct interpretation of client’s requirement, Omission during design, Change in plan and scope by client, Error during design, Ineffective coordination and integration of components, Inadequate resources, Conflicting of opinions between participants, Lack of quality management system, Late user involvement, Poor communication, Lack of support to site management, Poor information flow, Defective workmanship, Carelessness, Inadequate funding

Rework committee of Construction Owners Association of Alberta (2001), developed the fish bone or cause and effect diagram classification system to categories the causes of rework. They classify rework causes into 5 main categories and each category contains 4 main causes.

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