在供應鏈網路中降低變異和同步化流程是達成及時交貨的關鍵。交期績效的評估在供應鏈中的全面管理和控制是重要的構成要素。在本研究中我們使用前置時間(Lead time)和交期績效圖(Delivery performance chart; DPC)評估供應鏈網路中每階段的交期績效。前置時間對組織而言是重要的交期績效準則。交期績效圖(Delivery performance chart; DPC)是由製程能力指標(Process capability index; PCI)和摩托羅拉六標準差(Motorola Six-Sigma) 組成的並且能同步地顯現供應鏈網路中交期績效的眾多重要特性。我們也藉由在交期績效圖中描繪PCI的下信賴界限(Lower confidence bound; LCB)。LCB是以樣本資料為基礎，在考慮抽樣誤差下來衡量最小交期能力的衡量工具。最後，我們將所提出的方法應用在筆記型電腦產業商業流程的個案研究並且評估該供應鏈流程中每階段的交期績效。

Variability reduction and business synchronization are acknowledged as keys to achieve timely deliveries in supply-chain networks. The evaluation of delivery performance is a crucial component in the overall management and time control of a supply chain. In this research we use the lead time and delivery performance chart (DPC) to measure the delivery performance of every stage in a serial supply chain. The lead time is an important metric of delivery performance for organizations. The DPC integrated by the process capability indices (PCIs) and the concept of Motorola Six-Sigma is proposed to provide several simultaneously visualized important features of delivery performance in a supply chain. We also consider the uncertainty of the estimated PCIs caused by sampling data and plot their lower confidence bounds (LCBs) in the DPC to measure the minimum delivery capability of each stage in the supply chain. Finally, a case study related to a supply chain of notebook industry is presented to demonstrate how the proposed approach can be applied to evaluate delivery performance for the further variability reduction of the lead time.

CONTENTS
CHINESE ABSTRACT..................................................i
ABSTARACT.........................................................ii
ACKNOWLEDGEMENT...................................................iii
TABLES OF CONTENTS................................................iv
LIST OF TABLES....................................................v
LIST OF FIGURES...................................................vi
CHAPTER I INTRODUCTION............................................1
CHAPTER II LITERATURE REVIEW......................................5
2.1 Delivery Window...............................................5
2.2 Process Capability Index(PCI).................................6
2.3 Concept of Motorola Six-Sigma.................................8
CHAPTER III METHODOLOGY...........................................10
3.1Supply Chain Model.............................................10
3.2Lower Confidence Bound (LCB)of PCIs for the Supply Chain Model.12
3.2.1 Lower Confidence Bound of Cpm...............................13
3.2.2 Lower Confidence Bound of Spk...............................16
3.3 Delivery Performance Chart(DPC)...............................20
3.3.1 Motorola Six-Sigma Level Zones..............................21
3.3.2 Cpm DPC.....................................................23
3.3.3 Spk DPC.....................................................26
CHAPTER IV AN APPLICATION CASE....................................28
CHAPTER Ⅴ CONCLUSION.............................................37
REFERENCE.........................................................38
Appendix..........................................................43
作者簡介...........................................................47

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