TY - CONF TI - Production Process Evaluation for Earthworks C1 - Berkeley, California, USA C3 - Proc. 28th Annual Conference of the International Group for Lean Construction (IGLC) SP - 601 EP - 602 PY - 2020 DO - 10.24928/2020/0020 AU - Haronian, Eran AU - Sacks, Rafael AD - PhD Candidate, Seskin Virtual Construction Laboratory, Faculty of Civil and Environmental Engineering, Technion – IIT, eranha@campus.technion.ac.il, orcid.org/0000-0001-9056-1722 AD - Professor, Seskin Virtual Construction Laboratory, Faculty of Civil and Environmental Engineering, Technion – IIT, cvsacks@technion.ac.il, orcid.org/0000-0001-9427-5053 AB - Production in earthworks projects is a continuous process of strictly sequenced operations performed by heavy machinery on site. The Production Process Evaluation (PPE) index was developed to evaluate these types of processes by quantifying waste in the bottleneck operation. The PPE index is the ratio of the actual production volume to the theoretical maximum production volume, and it is calculated by assessing value adding and nonvalue adding times, actual and theoretical throughput, and shift durations. These are computed using data obtained from machine control systems linked to the roadel information schema, which represents continuous products and processes. The PPE index was implemented on a case study of a water reservoir construction project. The spreading operation was identified as the bottleneck in the process, based on the high levels of inventory waiting for the operation, the high capacity utilization in the operation and the low capacity utilization of the predecessor and successor operations. The PPE index ranged from 45% to 54% during the three weeks of the case study and indicated high levels of waste in the bottleneck and a lack of production management. KW - Bottleneck KW - earthworks KW - production KW - waste KW - workflow PB - T2 - Proc. 28th Annual Conference of the International Group for Lean Construction (IGLC) DA - 2020/07/06 CY - Berkeley, California, USA L1 - http://iglc.net/Papers/Details/1765/pdf L2 - http://iglc.net/Papers/Details/1765 N1 - Export Date: 29 March 2024 DB - IGLC.net DP - IGLC LA - English ER -