Optimal Ordering Policy with Backordering for Products of Imperfect Quality
      Ruey Huei Yeh, Tzu Hui Chen   

Interrelationships Between Attitudes Toward Money and Willingness of Credit Card Usage
     Wann-Yih Wu, Shu-Mei Lin

Parallel Decomposition Approach to Reducing the Scale of Experiments in Robust Design
      Hajime Yamashina, Hajime Mizuyama

Inventory Models for Spare Parts of Semiconductor Equipment with Variant Lead Time and Demand Rate
     Ying-Chyi Chou, Pao-Long Chang, Ming-Guang Huang