'O' on a PERT/CPM chart represents

'O' on a PERT/CPM chart represents Correct Answer An ordinary event

The Symbol on a PERT / CPM chart represents:
An ordinary event
A significant event representing some mile-stone
An event to be transferred to other network chart
Dangling event

Related Questions

In the following figure, pentagon represents politician, hexagon represents sportsman, circle represents pilot and square represents architect. ‘Z’ represents?