| Summary: | 碩士 === 國立中央大學 === 土木工程研究所 === 90 === Estimation of unit rate is essential for determination of an activity’s duration and its corresponding cost. Traditionally the activity unit rate is estimated by expert’s experience or by simply the statistical average of historical data. Both are rough and inaccurate.
This study develops a multivariate linear regression model for the estimation of activity unit rate. More than 400 records of data for activities of concrete placement and steel rebar in bridge superstructure construction were collected and used for the analysis. Two multivariate linear regression model, one for the concrete placement (R2＊= 0.8558) and the other for the steel rebar (R2＊= 0.7196), are developed as a result. The crew size, unit work quantity, % of foreign workers, and findings are reported.
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