Estimator’s Electrical Man-Hour Manual, Third Edition (Estimator’s Man-Hour Library) by John S. Page pdf

Estimator’s Electrical Man-Hour Manual, Third Edition (Estimator’s Man-Hour Library) by John S. Page.

PREFACE: This third edition is fully updated with the addition of a new section on electrical insmunent installation consisting of eleven new tables. The labor units, which are expressed in manhours throughout this manual, are for assisting the estimator in estinmfing electrical installation labor cost for an individual item of work or total project direct cost The thousands of manhour units that follow, for the most part, are averages of many projects constructed in the Gulf Coast area. Most of these projects were petrochemical related. After extensive time and method studies and production evaluation of in “drvidual electricians, it was determined that the average pexforming productivity for the Gulf ~ area was equal to 7096.

The manhours throughout this manual are based on this percentage. To correctly apply these manhours to a particular project, a productivity factor giving consideration to location and conditions should be established for application against these manhours. The reader should therefore carefully note the introduction on the following pages, because it outlines a method for obtaining such a productivity factor. The following basic manhour units provide a separate time allowance for a particular labor operation under specific conditions and circumstmtces all in accordance with the notes as appears on the individual table pages. To determine the direct labor dollar value of a project a composite labor rate should be established and applied against the various estimated manhours for the individual units or in total, whichever is desired. The introduction that follows outlines a method to establish the composite rate.

The Human Factor in Estimating

In this high-tech world of sphisticated software packages, including several for labor and cost estimmi, you migtlt wonder what a collection of manhour tables offers that a computer program does not. The answer is the human factor. In preparing a complete estimate for a refinery, petrochemical, or other heavy industrial project one often confronts 12-18 major accounLq, and each account has 5-100 or more sub-accounts, depending on the project and its engineering design. While it would seem that such munerot~ variables provide the perftec opportunity for computerized algorithmic solution, accurate, cost-effective, realistic esthnati is still largely a function of human insight and expertise. Each project has unique aspects that still require the seasoned consideration of an experienced professional, such as general economy, projects supervision, labor relations, job conditions, construction equipment, and wemer, to name a few. Computers are wonderful tools. They can solve problems as no hmnan can, but I do not believe construction e~ is their fort~. I have reviewed several construction estimating software packages and have yet to find one that I would completely rely on. Construction estimating is an art, a science, and a craft, and I recommend that it be done by those who undemt, and and appreciate all three of these facets. This manual is intended for those individuals. John s. Pace



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