Page 5 - Industrial Process Plant Construction Estimating and Man Hour Analysis

Preface

Construction projects are divided into three sectors: building, infrastructure,
and industrial construction.
Building construction: This sector is divided into residential and commer-
cial building.
Infrastructure: Infrastructure is divided into heavy civil engineering that
includes airports, bridges, dams, tunnels, highways, hydropower, water
treatment, distribution, and rapid-transit systems.
Industrial construction: Industrial construction includes refineries, power
generation, mills, and manufacturing plants. These projects are identified by
the plant process and vary in size and complexity.

This edition of Industrial Process Plant Construction Estimating and
Man-Hour Analysis focuses on industrial process plants and enables the esti-
mator to apply statistical applications, estimate data tables, and estimate sheets
to use methods for collecting, organizing, summarizing, presenting, and analyz-
ing historical man-hour data. As construction processes become more complex,
contractors are placing a greater importance on specialized education. It is
increasingly important for estimators, engineers, and construction managers
to have a bachelor’s degree in a construction-related field. A strong background
in mathematics and statistics is essential. Estimators are required to set up cost
codes, summarize and analyze historical data and trends, and maintain labor
data bases by entering and backing up data. Construction-work estimating data
sets or books are used for construction analysis and cost estimating. These data
sets and books need to be evaluated for accuracy, reliability, verifiability, and
convenience. The construction business requires statistical methods, indexing,
cost analysis, and estimating to provide detailed accurate bid proposal to handle
increasing competition. Engineers and contractors use statistical methods, his-
torical data, and man-hour tables, which are entered into the computer, that
model the work of construction. The purpose of this book is to provide the
reader the latest estimating and statistical methods to evaluate the accuracy
and verify historical data collected from field installation of process piping
and equipment in industrial process plants. The book begins with the introduc-
tion devoted to labor, productivity measurement, collection of historical data,
estimating methods, and factors affecting construction labor productivity and
impacts of overtime. Then, estimating is developed, and project sections for

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