ABSTRACT

In the face of increased competition and globalization, supply chain management has become a crucial aspect of securing competitive advantage. Within this, the quality offered by suppliers is vital. Thus, in this paper, we develop a model to select the best supplier based on process quality from the perspective of the buyer. We first employ the process capability index $S_{pk}$, which can provide an exact measure of process yield, to evaluate the process quality of suppliers. However, $S_{pk}$ must be estimated from preliminary samples or obtained subsamples. This increases uncertainty and can lead to miscalculation. To ensure the reliability of assessment, we derive the lower confidence limit of $S_{pk}$ to serve as a standard of process quality assessment and construct a process capability analysis chart to select the best supplier. The chart also provides recommendations for process improvement to serve as a reference for suppliers with poor performance. Finally, we present two real-world case studies to demonstrate the practical applicability of the proposed method.

摘要

面对日益激烈的竞争和全球化，供应链管理已成为确保竞争优势的关键方面。在这一点上，供应商提供的质量至关重要。因此，在本文中，我们开发了一个模型，可以从买方的角度根据过程质量选择最佳的供应商。我们首先采用过程能力指数${\mathrm{小号}}_{pķ}$，它可以提供过程收率的准确度量，以评估供应商的过程质量。然而，${\mathrm{小号}}_{pķ}$必须从初步样本或获得的子样本中估算出来。这增加了不确定性，并可能导致计算错误。为了确保评估的可靠性，我们推导了下限的置信度${\mathrm{小号}}_{pķ}$作为过程质量评估的标准，并构建过程能力分析图以选择最佳供应商。该图表还提供了流程改进的建议，以作为绩效不佳的供应商的参考。最后，我们提供了两个实际案例研究，以证明所提出方法的实际适用性。