94 resultados para CMM


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软件企业在实施CMM(capabilitymaturitymodelforsoftware)的过程中面临最主要的障碍是如何将CMM软件过程模型转换成可实施的、体现组织过程特征的CMM实施过程模型.可以利用模型驱动架构MDA来支持CMM模型转换,其首要问题是建立CMM软件过程元模型.通过分析CMM软件过程,给出了面向CMM的软件过程工程元模型SPEM的扩展策略,提出了一个基于SPEM的CMM软件过程元模型——SPM-CMM.该元模型既支持CMM软件过程的抽象语法和规则语义,也支持利用UMLCASE工具操作CMM软件过程模型.

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提出了一种基于模型融合的CMM实施过程建模方法.该方法使用软件过程工程元模型SPEM建立CMM过程模型CPM和企业过程模型EPM,通过融合CPM和EPM来获得CMM实施过程模型C IPM.文中利用带标记的有向图描述过程模型,给出了模型融合方法,并进行了一致性证明.最后通过一个过程模型融合原型工具和实例说明了方法的应用情况.

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1 概述随着软件系统的日益复杂化和用户需求、软件更新的频繁化,配置管理逐渐成为软件生命周期中的重要控制过程,成为软件工程中质量管理中的重要内容。软件配置管理(Software Configuration Management)是通过技术或行政手段对软件产品及其开发过程和生命周期进行控制、规范的一系列措施。配置管理的目标是记录软件产品的演化过程,确保软件开发者在软件生命周期中各个阶段都能得到精确的产品配置。它通过控制、记录、追踪对软件的修改和每个修改生成的软件组成部件来实现对软件产品的管理功能。为了保证对产品有效地进行控制和追踪,配置管理过程不能仅仅对静态的、成形的产品进行管理,而必须对动态的、成长的产品进行管理。由此可见,配置管理同软件开发过程紧密相关。配置管理必须紧扣软件开发过程的各个环节,使整个开发团队象一个交响乐

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内部质量审核是实施ISO9000认证的质量保证体系的重要组成部分。文章阐述了吸取CMM模型思想在过程控制与改进方面的优势,建立企业的过程数据库,拓宽内部质量审核工作的时间与空间,寻求工作方式方法的改进与优化。

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软件需求的定义比较多,各种定义之间比较容易混淆,学术界倾向于把整个需求范围称之为“需求工程”。从软件工程角度来讲,把整个软件需求研究领域划分为“需求开发”和“需求管理”比较合适。图1表明了需求开发和需求管理在整个需求工程中的关系。

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中国计算机学会

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This paper details the prototyping of a novel three axial micro probe based on utilisation of piezoelectric sensors and actuators for true three dimensional metrology and measurements at micro- and nanometre scale. Computational mechanics is used first to model and simulate the performance of the conceptual design of the micro-probe. Piezoelectric analysis is conducted to understand performance of three different materials - silicon, glassy carbon, and nickel - and the effect of load parameters (amplitude, frequency, phase angle) on the magnitude of vibrations. Simulations are also used to compare several design options for layout of the lead zirconium titanate (PZT) sensors and to identify the most feasible from fabrication point of view design. The material options for the realisation of the device have been also tested. Direct laser machining was selected as the primary means of production. It is found that a Yb MOPA based fiber laser was capable of providing the necessary precision on glassy carbon (GC), although machining trials on Si and Ni were less successful due to residual thermal effects.To provide the active and sensing elements on the flexures of the probe, PZT thick films are developed and deposited at low temperatures (Lt720 degC) allowing a high quality functional ceramic to be directly integrated with selected materials. Characterisation of the materials has shown that the film has a homogenous and small pore microstructure.