MDM-Based Buffer Estimation in Construction Project

Rohan Singhal1, J. Uma Maheswari2, V. Paul C. Charlesraj3 & Aritra Pal4

1Graduate Student, Indian Institute of Technology Delhi, New Delhi, India,
2 Assistant Professor, Indian Institute of Technology Delhi, New Delhi, India,
3Associate Professor, RICS School of Built Environment, Delhi NCR, India,
4Assistant Professor, RICS School of Built Environment, Mumbai, India,


Schedule delay and cost overrun are the two major challenges for the successful project delivery in construction. It has been reported that significant delays in construction projects are caused by rework and there are several reasons for rework. A framework has been proposed to assess the delay due to two primary reasons for rework, (i.e. design changes and non-conformances), using Multiple Domain Matrix (MDM), a matrix-based technique. This methodology would help the project planners to create an as-adjusted schedule that is more appropriate compared to as-planned or as-built schedules. Further, it is possible to arrive at a meaningful estimate of activity buffer time in order to account for delays due to rework. Eventually, this would lead to successfully implement one of the key principles of lean, namely, elimination of time-related “waste” that is due to defect and/or delay.


Buffer, delay assessment, job-sequencing, multiple domain matrix, waste



Singhal, R. , Maheswari, J.U. , Charlesraj, V.P.C. & Pal, A. 2018, 'MDM-Based Buffer Estimation in Construction Project' In:, 26th Annual Conference of the International Group for Lean Construction. Chennai, India, 18-20 Jul 2018. pp 1344-1353

Download: BibTeX | RIS Format