本研究目的為(1)、調整或改善營造廠鋼構工程自辦分包制度及中衛體系。(2)、從營造廠角度切入,跨足鋼構工程專業承商領域,提昇營造廠競爭優勢,增加企業投標得標率及利潤獲利率。本研究採個案研究,廣泛收集鋼板種類適用性,中鋼鋼板採購流程,物價波動對鋼骨成本效益,鋼骨製程、加工及施工相關文獻,以承造實例驗證分析。 所得結論共計七點:(1)、鋼構工程發包與自行拆包管理,營造廠可獲取專業承商利潤,有效增加營造廠獲利及優勢競爭。(2)、由研究中得知鋼材佔鋼骨工程成本比例甚重,由三實例案件與鋼材物價指數變動率得知,鋼材價格變動越大,自辦風險越高,相對獲利率亦較不穩定。(3)、營造廠人員心態須重新調整。(4)、鋼樑代用制,ROLLER- H與BUILD- H產品價格差異大,以RH代用BH,則成本可再降低。(5)、自辦實際案例顯示,以成本驅動因子回歸競爭力之提升達 6.1%、1.06 %及2.9%如下表,如與市場行情作比較則效益更分別為21.7%、3.62%及15.8%。(6)、SRC案例BH與RH代用比例高達64%,較一般SS鋼構建築之15%~20%高。(7)、利用Weihrich之SWOT 矩陣分析鋼構自辦競爭優劣矩陣。 The purposes of the study are 1.to modify or improve the make or buy decision strategy of steel frame construction.2.the construction industry obtains more profits and promotes competitive advantages in make or buy decision. The study adopts case-study methodology to analyze data of the categories of steel plates, the purchase system of CSC steel plates, effects of price fluctuation for steel plates cost, steel manufacture process. There are seven conclusions in the study as follows: (1).The construction industry can increase profits and competitive advantages with make or buy decision. (2). The steel plate is the majority in the cost of steel frame construction. The more variation of steel price, the higher risk of the make or buy decision, the rate of a profit of construction company is uncertain. (3) The employees of the construction industry need to have new attitude in the steel frame construction strategy. (4).With RH substituted for BH, the construction industry can reduce cost. (5).In three cases ,the reduced cost rate ( the steel construction /total cost) is 6.1%、1.06 %及2.1%. Compared to market cost, the rate of reduced total cost is 21.7%、3.62%及15.8%。(6). In SRC case study, 64% RH substituted for BH is higher than other construction of 15%~20%.(7).With the SWOT of Weihrich, to establish the SWOT matrix of the steel frame construction strategy.