Based the principle and characteristic of model GM (1,1), we derive the new formula of background value. And then it could improve the simulation and prediction precision effectively.
Lin, M. C. (2011). 營建專案工程時程預測之研究
─ 以SRC工程專案為例 [doctoral dissertation, National Taiwan University]. Airiti Library. https://doi.org/10.6342/NTU.2011.01839