TY  - CONF
TI  - Factors Affecting Work Flow Reliability - A Case Study
C1  - Taipei, Taiwan
C3  - 17th Annual Conference of the International Group for Lean Construction
SP  - 177
EP  - 186
PY  - 2009
AU  - Liu, Min
AU  - Ballard, Glenn
AD  - Assistant Professor, Department of Civil, Construction, and Environmental Engineering, 211 Mann Hall, 2501 Stinson Dr., North Carolina State University, Raleigh, NC 27695-7908, Phone +1 919/513-7920, FAX 919/515-7908, min_liu@ncsu.edu
AD  - Associate Professor, Civil and Env. Engineering. Department, 214 McLaughlin Hall, Univ. of California, Berkeley, CA 94720-1712, Phone +1 510/642-2016, FAX 510/643-8919, ballard@ce.berkeley.edu
ED  - Cuperus, Ype 
ED  - Hirota, Ercilia Hitomi 
AB  - Low work flow reliability is a major contributor to the construction industry’s dismal productivity record. The purposes of this paper are to identify the factors affecting work flow reliability, learn from failures of completing work plans, and recommend strategies to improve work flow reliability in order to improve productivity for construction projects. We collected production data of 592 working days in 12 working areas from a pipe installation project which implemented the Last Planner System. The data included the number of daily planned tasks, daily planned tasks completed, daily tasks completed non-planned, daily tasks uncompleted, daily planned man-days and completed man-days. Root causes of uncompleted tasks were also documented. Based on the data collected, correlation analysis was conducted to study the factors affecting work flow reliability. We found that commitment plan, prerequisite work, material and weather are the top four factors affecting work flow reliability. Strategies on how to effectively improve work flow reliability are also recommended. The findings can help project managers focus on the important factors causing work flow variation in their work plan and improve labor productivity. The results can also help consulting companies pinpoint root causes and responsibility for productivity losses in claims.
KW  - Work flow
KW  - work flow reliability
KW  - last planner system
KW  - lean construction
KW  - productivity.
PB  - 
T2  - 17th Annual Conference of the International Group for Lean Construction
DA  - 2009/07/15
CY  - Taipei, Taiwan
L1  - http://iglc.net/Papers/Details/657/pdf
L2  - http://iglc.net/Papers/Details/657
N1  - Export Date: 25 April 2024
DB  - IGLC.net
DP  - IGLC
LA  - English
ER  -