【正文】 ntitative information as a useful guide for scheduling RC building superstructures. Keywords: Multistage scheduling, repetitive project, RC building, GMSM Introduction In Taiwan, contractors are being specialized in certain types of construction in an increasingly petitive environment and this specialization requires some scheduling models to provide a better scheduling for each type of construction. The majority of highrise buildings located in urban areas in Taiwan are RC structures. It is deemed crucial for highrise buildings that a scheduling model for this type of construction can not only increase profits but also reduce the impact on urban traffic. Of the highrise buildings constructed to date, the work planning technique has been 山東建筑大學 畢業(yè) 設計 外文文獻及譯文 2 monly adopted in scheduling. The Critical Path Method (CPM) is the most popular one。 and (2) repetitive works, such as superstructures with standard floor designs. In the former category, CPM is utilized to execute scheduling. For the latter, a scheduling model suitable for repetitive construction has to be developed. Reda (1990) and Cole (1991) also demonstrated the necessity of scheduling for repetitive projects. This study, according to O’Brien’s suggestion, is to develop a graphicalbased scheduling method applicable to repetitive projects of RC building superstructures so that the most popularly practiced construction method in Taiwan, sitecast concrete structures with wooden forms, may be in line with it. Literature reviews The theoretical scheduling approach of repetitive projects is based on the principle of ‘Assembly Line Balance’, in which there are two premises: (1) work continuity for each activity from one unit to the next, and (2) appropriateness for the lowerbound limit of construction intervals between adjacent activities within the same unit. The principal methods for repetitive scheduling are the Line of Balance (LOB) method and the Linear Scheduling Method (LSM). The difference between them is that the duration between units having identical activities is assumed as a constant for LOB method, and variable for LSM (Moselhi and Khaled, 1993). In recent decades, for the scheduling of repetitive projects, a number of methodologies have been developed, such as linear programming (Handa and Barcia, 1986。 Russell and Caselton, 1998), dynamic programming (Selinger, 1980。 Eldin and Senouci, 1994。 ElRayes and Moselhi, 2021), simulation (Halpin, 1977 (CYCLONE)。 Kavanagh, 1985 (SIREN)。 Lutz et al., 1994。 Shi and AbouRizk, 1998), neural 山東建筑大學 畢業(yè) 設計 外文文獻及譯文 3 work (Adeli and Karim, 1997), and geic algorithms (Hegazy and Wassef, 2021。 (2) starting any activity on any floors must wait for the pletion of the same activity on the previous floors。 and (4) the construction method shall remain the same for each floor. Since both form workers and rebar workers are two main categories of labor in the construction of RC building superstructures in Taiwan, maintaining work continuity within each floor can reduce idle time. Therefore, the first assumption is in accordance with the construction custom of RC buildings. The second assumption satisfies the resource reuse. Since the construction method of RC buildings consists of some welldefined activities, the duration for identical activities performed by sk