In this paper,we examine some principles in managing manufacturing systems.These principles are concerned with the variability,the utilization,the rework,the lead time,and the constant work-in-process efficiency.Whil...In this paper,we examine some principles in managing manufacturing systems.These principles are concerned with the variability,the utilization,the rework,the lead time,and the constant work-in-process efficiency.While these principles are developed through analyzing some simpler disconnected flow line manufacturing systems,we examine whether they can have broad applications.For some of these principles,we provide sufficient conditions,while for others,we provide counterexamples.Our analysis suggests that we should be very cautious about these laws when applied to non-Markov and non-tandem systems.展开更多
In software development life cycle, Software Process Management (SPM) acts as a significant part throughout the execution of project. In this study, the application of control chart for analyzing the stability of soft...In software development life cycle, Software Process Management (SPM) acts as a significant part throughout the execution of project. In this study, the application of control chart for analyzing the stability of software process and defects in the software product is discussed. This paper will discuss the analyzing impact or collision of rework effort, defect density, inspection performance and productivity by using control charts. This paper also explains the benefits and challenges of using control charts in software organization.展开更多
基金the Natural Science and Engineering Research Council of Canada,the National Natural Science Foundation of China(No.71271131)the Academic Research Fund and the E-Business Center of National University of Singapore,and the Central Research Grant of Hong Kong Polytechnic University(G-YN82).
文摘In this paper,we examine some principles in managing manufacturing systems.These principles are concerned with the variability,the utilization,the rework,the lead time,and the constant work-in-process efficiency.While these principles are developed through analyzing some simpler disconnected flow line manufacturing systems,we examine whether they can have broad applications.For some of these principles,we provide sufficient conditions,while for others,we provide counterexamples.Our analysis suggests that we should be very cautious about these laws when applied to non-Markov and non-tandem systems.
文摘In software development life cycle, Software Process Management (SPM) acts as a significant part throughout the execution of project. In this study, the application of control chart for analyzing the stability of software process and defects in the software product is discussed. This paper will discuss the analyzing impact or collision of rework effort, defect density, inspection performance and productivity by using control charts. This paper also explains the benefits and challenges of using control charts in software organization.
