טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentYurovsky Areh
SubjectIdentification and Characterization of Waste in Private
Construction in Israel in Light of Lean
Construction Principles
DepartmentDepartment of Civil and Environmental Engineering
Supervisors Professor Rafael Sacks
Professor Amnon Katz
Full Thesis text - in Hebrew Full thesis text - Hebrew Version


Abstract

The construction sector in Israel, as in other countries, is characterized by waste. The Lean Construction approach, developed over the last decade, contains principles and ideas that can lead to waste reduction. During my studies I was employed by two major construction companies. Working in parallel to my studies gave me the opportunity to use the action research approach, in which the researcher can study the managerial environment of which he is a part.

This research presents a standard process flow that shows the activities which are required to build a civil engineering project. The research focused on private housing construction, in which the various sources of waste sources were identified. For this purpose, many case studies were collected during the field work and then grouped according to similar cases. Waste sources that occurred in each group were defined. In addition, case studies and waste sources were characterized by: root waste cause, waste type and the waste result. Several case studies were chosen, described in a more detailed manner and their waste was quantified.

The main findings of this research are:

1. There is a tendency to confuse waste in construction with construction defects. It’s clear that products handed over to customers with zero defects are not necessarily free of waste.

2. From the list of root waste causes: Man, Materials, Methods, Machines and Management, the most common is clearly Management.

3. Following quantification of some of the case studies the following can be stated:

- In many situations waste quantification is very difficult because of information unavailability.

- “Customer distress/ damage to company reputation” is the most difficult waste result to be quantified.

- Accurate and reliable analysis of waste can be done only with the close cooperation of decision makers, or indeed by them.

This research is designed to be the first in a series of projects aspiring to reduce waste in the construction sector. Possible further research subjects are:

- Use of the tools developed in a construction company in order to identify, quantify and reduce waste. This must be done with the close cooperation of company senior management.

- Measuring the relative value of every waste source and estimation of the risk they pose to a project’s success.

- Analysis of waste in the public construction sector, using the typology developed.