job production

automatic production

continuous production

intermittent production

the flow of material in the plant

the methods of proper utilization of manpower

the methods of proper utilization of machines

the layout of factory facilities

dummy

event

activity

contract

an activity of the project is denoted by an arrow on the net work

the tail of the arrow indicates the start of the activity

the head of the arrow indicates the end of,the activity!

the arrows are drawn (to scale from) left to right

event

free float

artificial

dummy.