前期准备的重要性
软件类型对开发的影响
顺序开发还是迭代开发
问题定义的先决条件
需求的先决条件
构架的先决条件
前期准备上花费的时间比例(The importance of pre preparation

The impact of software types on Development

Sequential development or iterative development

Prerequisites for the definition of a problem

Prerequisites for demand

Prerequisites for the framework

The proportion of time spent on pre preparation)