A Study of Project Buffer on New Product Development Project Scheduling

• Main Authors: Ching-Yi Huang, 黃瀞儀
• Other Authors: Yu-Cheng Lee
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/20940453142175325575

碩士 === 中華大學 === 科技管理學系碩士班 === 102 === Rapid progress in science technology and customer globalization, the new product life cycle becomes shorter trend. But the price gross profit becomes lower year after year to consumer electronics products. The new product development cycle is now only about six months to a year long. The main reason is that the companies intent to launch their products quickly in order to seize market share and earn the higher profit margins, so the time is now a key factor in winning business.In recent years, Project management is getting increasing attention, and applied to the new product development in enterprises. This is not only to enhance the project scheduling skills, quality and cost control and monitoring capabilities, but also strengthen the ability of the enterprise in the overall competition. The Survey from IT Standish Group website (www.standishgroup.com)found that the completed software projects were only about 17% which could keep the effectiveness, cost, time and scope, etc. targets as the goals were set by the time the project kicking off, the other 50% of projects were requested to modify the original goals, and the last 33% of the projects were even been closed in the United States. Dr. Goldratt presented the critical chain project scheduling method which is derived from the Theory of Constraints (TOC).This is the therory to resolvie the constraints and issues of traditional projects from the actual execution proces. Removing bad habits from project members, to improve the chances of the project can be completed on schedule, without the safety time into a single task, and then pull out all the safety time (buffer time) for project schedule management. However, the buffering time caculation is too subjective from the critical chain method, and project managers can not apply it into the actual project management. The buffer time is set as like the production of emergency stocks, the time will affect more or less on time, cost facts. This study is using @ Risk 6.0 software, Monte Carlo simulation for case scheduling analysis. The task lead time estimation is mainly based on the results of interviews with experts as benchmarks, and then moving all of single task buffer time into a project (Project buffer); consider its risk factors in order to optimize the project plan. Last, the setp is to compare the different project buffer time from the methods of PETR、RSEM、CCPM, and the actual project case to achieve a reasonable buffer time.