好软件，三选二（Good Software, Select Two of the Three）

攻读电脑科学的朋友，必定会读到这一句话，只是会有多少人记得？
“好，快，便宜，选二。”=>快在这里，是软件开发时间短。
要又好又便宜的软件，慢工出细祸，就不会快交货！
要又快又便宜的软件，软件素质就不会好！
要又快又好的软件，当然要更多高素质的工作人员，更有效的管理，当然，就不便宜了！
当然，现实上并没有这么极端，所以开发软件往往就在这三个中找一个接受点，比如：90%好，70%快，40%便宜等等。又快又好又便宜，说实在，不存在吧？所谓又快又“好”又便宜的东西，有一天，可能你就知道，并不好，只是太迟了。
坏的软件，选零，或选一吧！
Computer science graduates normally will come across to this statement: "Good, Fast, Cheap, Select Two!" (Fast, is short software development time.)
A good and cheap software, the development will be slow!
A fast and cheap software, the quality will not be good!
A fast and good software, requires greater developers, and more effective management, thus of course, not cheap!
In real life, we will not choosing two, but in fact, finding a accepting point among the three, for example, 90% good, 70% fast, and 40% cheap, etc. Software that is fast, good, and cheap, we should said, not exist! Even someone claimed that it exist, one day you may know, he was just want to close the sales, the software isn't good, but it will be too late!
Bad Software, Select None, or Select One!