TY  - CONF
TI  - The Impact of Variability in Workflow
C1  - Perth, Australia
C3  - 23rd Annual Conference of the  International Group for Lean Construction
SP  - 826
EP  - 835
PY  - 2015
AU  - Deschamps, Ramon Roberto
AU  - Esteves, Rafael Reis
AU  - Rossetto, Rodrigo
AU  - Tomazi, Luiz Filipe
AU  - Silva, Glauco Garcia Martins Pereira Da
AD  - Project Planner, Engineer Department, RDO Empreendimentos, 120 Koesa street, São José, Brazil, Phone +55 (48) 9944-3333, ramon@rdo.com.br
AD  - Member of Study Group in Lean (Glean) of Production Engineer Department in UFSC, Florianópolis, Brazil, +55 (48) 3721-7055 , rafa.esteves19@gmail.com
AD  - Member of Study Group in Lean (Glean) of Production Engineer Department in UFSC, Florianópolis, Brazil, +55 (48) 3721-7055, rodrigorosseto.8@gmail.com
AD  - Member of Study Group in Lean (Glean) of Production Engineer Department in UFSC, Florianópolis, Brazil, +55 (48) 3721-7055, filipetomazi@gmail.com
AD  - Professor of Federal University of Santa Catarina (UFSC), Coordinator of Simulation and Production Systems Lab, UFSC, Brazil, +55 (48) 3721-7055 glauco.silva@ufsc.br
ED  - Seppänen, Olli
ED  - González, Vicente A.
ED  - Arroyo, Paz
AB  - Singularity, lack of predictability, turnover, making do, these are only a few factors that compose the process-variability in the construction industry. The knowledge of stability in activities workflow is fundamental to allow a construction company to have accurate planning. This paper evidences the impact of variability into the construction planning by using Monte Carlo simulation. It was developed the Line of Balance (LOB) of a project and generated ten thousand lead times based on the probability distribution measured on gemba for these activities. According to the simulation, the variability has a high impact on projects process time. Moreover, the delays occurred in all ten thousand events of simulation and the average delay was 12 days. In addition, the average idle time observed was 10 days and it occurred because of process-time and flow variability. According to the study, the model proves the negative impact of variability in workflow and a model to calculate LOB buffers should be developed with the intend of presenting less chance of breaks in the flow and projects delay. So, researches concerning about how to dimension theses buffers should be conducted. 
KW  - Lean construction
KW  - variability
KW  - Line of Balance
KW  - buffers
KW  - Takt Time Planning (TTP).
PB  - 
T2  - 23rd Annual Conference of the  International Group for Lean Construction
DA  - 2015/07/29
CY  - Perth, Australia
L1  - http://iglc.net/Papers/Details/1229/pdf
L2  - http://iglc.net/Papers/Details/1229
N1  - Export Date: 25 April 2024
DB  - IGLC.net
DP  - IGLC
LA  - English
ER  -