Lean-based sustainability refers to studying and analyzing a current process and improving it. The process can be
improved by indicating the non-value-added activities that delay the process and eliminating, combining, or
simplifying these non-value-added activities. In this manner, waste has been reduced to a minimum, and overall
process efficiency and customer satisfaction are augmented. The paper aims to oversee the current process of Manhole construction and work in a manner to reduce the time taken, materials used, and general resource wastes. Specifically, it has been observed that the Manhole backfilling process can be broken down into key activities. The process can be improved and made more efficient by linking lean-based tools to sustainability. The results have revealed that the overall process time and total lead time have been improved by around 17.6% and 41.2%, respectively. Furthermore, waste production has been significantly reduced by approximately 83.5%. The waste mentioned above reduction percentage has been obtained without sacrificing or compromising the quality and standards.

Keywords
Lean Construction, Sustainability, Lean based Sustainability, Value stream Mapping, Manhole Construction, Waste
Minimization.