Empirical Study on School Construction Estimating-Recheck Model

• Main Authors: Chien-Liang Chen, 陳建良
• Other Authors: Wei Lo
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/92712413941026290442

碩士 === 國立高雄第一科技大學 === 營建工程所 === 94 === Abstract Except for projects related to the 9/21 Earthquake, which were in need of special, urgent care and contracts were awarded to contractors with good reputations for delivering better quality, the method used for school building project contracting bids has been based on the total number of constructions. Whether the construction project is carried out successfully or not is influenced, in large part, by an accurate estimation of these numbers. Inaccurate numbers often result in difficulties on budgeting for different stages of a project and tracking spot progress (each spot broken into two to three tasks). The school building project budget is roughly divided into two parts; a part for the structure itself and a part for the construction repair. In Taiwan, the largest proportion of construction repair is that which involves concrete work. Repairs involve many various methods and building materials. Historically, the bidding method used for winning a contract were based on a single bid for the entire job rather than being broken down into the component parts. Using this method, it is difficult to know whether the budget is accurate for the project or not. This established the need for an effective regression analysis method for estimating recheck. This research takes the school building projects as example. It contains the collection of company bid cases from 1997 to 1999, as well as the actual settlements to form a database. The research uses multiple regression analysis to derive a formula for estimating the cost of constructions within an extremely tight accuracy range, both on structure and repair. The structure factor uses the total square meters of the template (prefabricated molding), compartmentalization and inside and outside windows and doors. The repair factor takes into account the inner wall tiles, flat top whitewashes, inside and outside windows and doors, outer wall repair and actual floor area repair. In addition, the research demonstrates how to use the formulas to predict unusual estimations as a reminder for school budgets as well as provides an estimation evaluator with items in need of priority attention.