软件开发的螺旋模型的原理是什么?简述螺旋模型的优缺点?
正确答案及解析
正确答案
解析
螺旋模型采用一种周期性的方法来进行系统开发,该模型是快速原型法,以
进化的开发方式为中心,在每个项目阶段使用瀑布模型法。这种模型的每一个周期
都包括需求定义、风险分析、工程实现和评审4个阶段,由这4个阶段进行迭代。软
件开发过程每迭代一次;软件开发又前进一个层次。优缺点:螺旋模型支持用户需
求的动态变化,为用户参与软件开发的所有关键决策提供了方便,有助于提高目标
软件的适应能力,并且为项目管理人员及时调整管理决策提供了便利,从而降低了
软件开发风险。螺旋模型需要开发人员具有丰富的风险评估经验和很强的专业知识f
螺旋模型只适合于大规模软件项目。
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