Predicting the effect of wastes on project cost using Multiple Linear Regressions

Waste has been considered as a great source of value losses of construction projects for a long time. The concepts of waste are based on the philosophies of lean production, which were initiated by Toyota Corporation in 1980s. The main purpose of this study is to develop an appropriate model to estimate the impact of waste factors on project performance cost using Multiple Linear Regressions (MLR). Based on the previous studies, nineteen waste factors were found. Data were collected through a structured questionnaire. The results indicated that MLR model gains the coefficient of determination of 79.8%. The difference between observed values and predicted values is not significant at level of 0.05.