title: Quantitative evaluation of the impact of night shifts and alcohol consumption on construction tiling quality.
abstract: The adverse effects of night-shift work and alcohol consumption on performance have received considerable attention. However, how night shifts and alcohol affect productivity in workers has not been quantified. This paper describes the experiments featuring multiple tiling tasks and patterns. The tiling quality performed by the graduate student participants in four different statuses was objectively evaluated by an edge-detection computer program. The results indicate that both night shift and alcohol significantly reduce the quality in general, and the effects of the factors on position and alignment-angle qualities were dissimilar in distinct areas due to tile patterns and size. Both night-shift and alcohol conditions affected the basic (-34.01% and -25.79%) and advanced tiling abilities (-40.14% and -26.16%), and night shift had a larger impact than alcohol. These results provide jobsite managers with usable information regarding how night shifts and alcohol affect workers' abilities to execute basic and advanced tasks.
authors.affiliation: Department of Civil Engineering, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsinchu 30010, Taiwan. Electronic address: rjdzeng@mail.nctu.edu.tw.
authors.forename: Ren-Jye
authors.initials: RJ
authors.lastname: Dzeng
authors.affiliation: Department of Civil Engineering, R.O.C Military Academy, No.1 Wei-Wu Road, Kaohsiung 83059, Taiwan. Electronic address: wss.cv91g@nctu.edu.tw.
authors.forename: Shih-Hsu
authors.initials: SH
authors.lastname: Wang
authors.affiliation: Department of Civil Engineering, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsinchu 30010, Taiwan. Electronic address: ken74921@hotmail.com.
authors.forename: Yi-Cho
authors.initials: YC
authors.lastname: Fang
mesh_terms: D000428:Alcohol Drinking / Q000009:adverse effects*; D060389:Construction Industry; D004526:Efficiency / Q000187:drug effects; D005260:Female; D006801:Humans; D008297:Male; D014937:Work / Q000523:psychology / Q000592:standards; D014940:Work Schedule Tolerance; D055815:Young Adult
keywords: Alcohol; Night shift; Tiling quality