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Fine-Grained Work Element Standardization for Project Effort Estimation
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作者 Peraphon Sophatsathit 《Journal of Software Engineering and Applications》 2014年第8期655-669,共15页
Traditional project effort estimation utilizes development models that span the entire project life cycle and thus culminates estimation errors. This exploratory research is the first attempt to break each project act... Traditional project effort estimation utilizes development models that span the entire project life cycle and thus culminates estimation errors. This exploratory research is the first attempt to break each project activity down to smaller work elements. There are eight work elements, each of which is being defined and symbolized with visually distinct shape. The purpose is to standardize the operations associated with the development process in the form of a visual symbolic flow map. Hence, developers can streamline their work systematically. Project effort estimation can be determined based on these standard work elements that not only help identify essential cost drivers for estimation, but also reduce latency cost to enhance estimation efficiency. Benefits of the proposed work element scheme are project visibility, better control for immediate pay-off and, in long term management, standardization for software process automation. 展开更多
关键词 PROJECT EFFORT Estimation WORK ELEMENT SYMBOLIC Flow Map latency cost Software Process Automation
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基于周期性和延迟代价的页面调度算法
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作者 侯昉 赵跃龙 王禹 《江苏大学学报(自然科学版)》 EI CAS 北大核心 2011年第5期557-561,596,共6页
针对缓存页面调度算法难以进一步大幅度提高命中率以改善系统性能的现状,提出了一种新算法.对页面访问的时间、位置和数量进行了统计,对页面读取延迟的时间范围进行了计算分析,设计了增加代价位的缓存数据结构,从而提出了基于周期性和... 针对缓存页面调度算法难以进一步大幅度提高命中率以改善系统性能的现状,提出了一种新算法.对页面访问的时间、位置和数量进行了统计,对页面读取延迟的时间范围进行了计算分析,设计了增加代价位的缓存数据结构,从而提出了基于周期性和延迟代价的页面调度算法,并对算法进行了调度模拟和实施验证.结果表明:当时间尺度为跨指令周期时,页面访问表现出周期重复发生的性质;利用此性质,将页面读取延迟作为页面换出决策的依据之一,尽可能推迟换出延迟代价的页面,当对这些页面发生周期性访问时,可以避免重复发生较大的读入延迟;该算法降低了存储系统的队列长度和等待时间,提升了系统性能. 展开更多
关键词 体系结构设计 算法 缓存 性能 周期性负载 延迟代价
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