Based on the COCOMO model and the current characteristics and situation of project software in aero space area, this paper discusses how to estimate the project software development effort.
基于COCOMO模型并结合中国航天系统型号项目软件开发的特点和现状，讨论了航天型号软件项目开发的成本估计方法。
Accurate workload estimate is an essential method of guaranteeing software development.
准确的工作量估算是保证软件开发正常进行的必要手段。
Software cost estimate is the most important basement of software development.
软件成本估计是软件开发的重要基础。
For instance, size metrics should be defined for software development projects, so that team members can measure the size of the products and estimate time and effort.
例如，要提前为软件开发项目定义度量规模的标准以便开发组成员估算产品规模、时间和工作量。
At the end of every software development phase, such as SRS and LLD, we should re-estimate our software size and adjust our project plan.
在每一个软件开发阶段的结束，正如SRS和LLD，我们可以重新评估软件的规模并调整我们的项目计划。
Estimate-convergence graph for software development, taken from Lecture 3, entitled "Software Schedule Estimation, " in the lecture notes section. (Image courtesy of MIT OCW. )
软体开发的预估收敛图， 取自课堂讲稿第三课，讲题为「预估软体开发的时程」。（图片由麻省理工学院「开放式课程网页」提供）
Estimate-convergence graph for software development, taken from Lecture 3, entitled "Software Schedule Estimation, " in the lecture notes section. (Image courtesy of MIT OCW. )
软体开发的预估收敛图， 取自课堂讲稿第三课，讲题为「预估软体开发的时程」。（图片由麻省理工学院「开放式课程网页」提供）
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