營造產業於目前台灣的產業市場日趨重要，如何讓營造工程於期限內順利完工，是很重要的課題。時程延遲是營建工程專案在執行上常見的問題之一，工程的複雜性、不確定性高，造成延遲的履約爭議也隨之提升。延遲發生的起因多於開始規劃設計階段，因為時間不足無法進行詳細設計與規劃，造成後續工期展延，爾後施工時造成的施工錯誤亦是原因之一。
根據Dickson 與Weber的研究指出：在供應商評價中，『交期』是最重要的因素之一，並且常被列為評價最主要的項目，雖然如此，衡量交期績效的相關文獻卻很少，所以本研究針對國內營建業的特性，導入六標準差的改善管理方法，以定義、衡量、分析、改善與控制流程，探討現今存在於營建業交期方面的缺失，首先提出一交期績效指標 進行衡量，根據交期績效指標，本文提供與它如期交貨比率的簡易對照表，將交期績效指標區分為交期準確度與交期精確度，發展出交期績效分析圖，作為協助衡量與分析的工具，此一分析圖於評估交期能力極為方便，且針對製程未達標準的工程運用品質機能展開（QFD）進行討論，找出此製程未達標準的原因進行改善，確認專案執行的可行性，並且利用檢定程序檢定判定是否獲得改善，透過改善後的資料建立一個資料庫方便往後的案例進行對照，希望藉此方法有效的提升交期績效並達到完美的客戶滿意度，使的企業得以永續經營。

Construction industry in the industrial market is more important in Taiwan, how to create a project was successfully completed within the deadline, it is very important issue. Time-delay is the common problems in construction industry. Complexity and uncertainty, resulting in delayed compliance disputes are increasing. The causes of delay occurred to start planning the design stage, because of the time insufficient for the detailed design and planning, resulting extension of the follow-up period, and the construction of the error caused by construction is also one of the reasons.
According to Dickson and Weber's research: evaluation of the supplier, 『delivery』 is one of the most important factor, and often the most important projects as assessment, nevertheless, the measure of delivery performance of the relevant literature rarely, so this dissertation uses the DMAIC method of six-sigma to enhance efficiency of construction Industry delivery.
It also applies the characteristics of process capability index to develop ” “ and analysis diagram of delivery as the tool to help of measuring and analyzing. The analysis diagram of measuring the delivery capability is very easy to use. It also can work with QFD side by side to make sure the reliability of the project.
The project of showing to enhance efficiency of construction Industry delivery is outstanding. It proves the developing model is correct and works.

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