论画网络图的规则

Disscusion about the Regulation of Drawing Network Pictures

网络计划技术有个重要的步骤是画网络图。当工序间的关系复杂时 ,画网络图就有一定的困难 ,画出的图 (以及画图的过程 )也往往是杂乱无章 ,缺少经验的人甚至干脆就画不出来。因此 ,需要找出画图的规律 ,使画图工作变得程序化 :无须费多少脑筋便能容易地画出清晰美观的网络图。本文主要说明如何用“分级”的方法来画网络图 ,使作图的过程简单易行 ,画出的图逻辑清晰。

PERT has an important process that is drawing network pictures.When the relations among the working procedure is complex,it is difficult to draw network pictures,the picture srawed is generally out of order.the man lack of experience perhaps cant draw up.so it is necessary to find out the regularity of drawing the picture.then it makes the work of drawing programmed:it is easy to draw clear,beautiful network pictures without much thinking.this paper mainly shows how to use the method of 'classifying' to draw network pictures.It makes the precess of drawing pictures easy in this method and makes the pictures clear and logic.