“…Linderman et al (2003) pointed out that Six Sigma could be implemented to the processes of producing manufacturing goods, business trade, executive management, and services. Recent research papers include improving operational safety [5], reducing amount of waste [8], improving quality for surveillance cameras to diminish related excess costs [10], enhancing the assembly efficiency of military products [4], increasing customer loyalty in the banking sector for Bank of America and Citigroup [21,22], reducing patients' waiting time and length of stay [3,17,29], reducing length of stay for Ophthalmology Day Case Surgery [16], reducing lead-time [1], enhancing staff satisfaction [7], reducing clinical errors [20], process improvement for both the radiology department and medication administration process [15], and process design of compressor-housing machining process [25]. Others include [2,6,11,12,18,19,24,26,28,29].…”