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Cost database : ウィキペディア英語版 | Cost database A cost database is a computerized database of cost estimating information, which is normally used with construction estimating software to support the formation of cost estimates. A cost database may also simply be an electronic reference of cost data. ==Overview== A cost database includes the electronic equivalent of a cost book, or cost reference book, a tool used by estimators for many years. Cost books may be internal records at a particular company or agency,〔J. David Nardon, Bridge and Structure Estimating'', McGraw-Hill Book Company, 1995, Page 5〕 or they may be commercially published books on the open market. Well known publishers include RSMeans (Reed Construction Data), Craftsman Book Company, Gulf Publishing Company, Cost Data Online (Richardson Estimating Standards), Frank R. Walker Company, BNI Building News, and Design & Construction Resources. The RSMeans Building Construction Cost Data book has a unit price section and a reference section.〔"RSMeans Building Construction Cost Data 2012, 70th annual edition" 2012 Reed Construction Data, Page v〕 The unit price section contains numerous items with unit prices for material, labor, and equipment, as well as the total unit price and the total unit price including overhead and profit. Additional information for items includes crew, daily output, labor hours, and the unit of measure. The items in RSMeans are organized by using the Construction Specifications Institute MasterFormat.〔"RSMeans Building Construction Cost Data 2012, 70th annual edition" 2012 Reed Construction Data, Pages 4, 5〕 Some of the other books also organize data in this way, even if they may not use the MasterFormat numbering. The reference section includes additional data such as crew listings, cost indexes, location factors, reference tables, and square foot costs.〔"RSMeans Building Construction Cost Data 2012, 70th annual edition" 2012 Reed Construction Data, Page v〕 A cost database typically includes such data as well as unit price data. The cost database may be stored in a relational database management system, which may be in either an open or proprietary format, serving the data to the cost estimating software. The cost database may be hosted in the cloud. Estimators use a cost database to store data in structured way which is easy to manage and retrieve.〔("A Visual Approach to Construction Cost Estimating" ), Phuwadol Samphaongoen, Marquette University, e-Publications@Marquette, Page 47〕
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