Production process evaluation for earthworks

Eran Haronian, Rafael Sacks

Research output: Contribution to conferencePaperpeer-review

3 Scopus citations


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 non-value 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.

Original languageEnglish
Number of pages12
StatePublished - 2020
Externally publishedYes
Event28th Annual Conference of the International Group for Lean Construction 2020, IGLC 2020 - Berkeley, United States
Duration: 6 Jul 202010 Jul 2020


Conference28th Annual Conference of the International Group for Lean Construction 2020, IGLC 2020
Country/TerritoryUnited States


  • Bottleneck
  • Earthworks
  • Production
  • Waste
  • Workflow


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