Integration of Lean Con. and Building Information Modelling
DB- Design-Build PPC- Percent Plan Completed
DBB- Design-Bid-Build TFV- Transformation-Flow-Value
EstGLC- Estonian Group for Lean Construction TPS- Toyota Production System
GC- General Contractor VDC- Virtual Design & Construction
IGLC- International Group for Lean Construction 5Whys- Root causes analysing technique
9
CHAPTER 2- PROBLEMS IN THE CONSTRUCTION INDUSTRY
In the second chapter of this thesis, the main problems and their causes are discussed. It is done by
analysing the literature, previous research in this field, and the results of empirical research conducted
among the main contracting companies in Estonia. Basically, the aim is to understand the reasons for
annaabi.ee 
