Question

What is the use of ‘dummy' in CPM network. 
• [A.] To give a start, that is a starting activity 
• [B.] To give logical representation in a network having an activity common in two operations running parallel to each other 
• [C.] To prevent two arrows having common beginning and end points 
• [D.] To represent the longest time taking activity in the network 
• [E.] To represent the shortest path of the network Choose the correct answer from the options given below :

• A. A and B
• B. B and C
• C. C and D
• D. D and E

Hint:

Dummy activities in CPM/PERT:
• Shown using dotted arrows
• Have zero duration
• Maintain logical dependency in networks They are used only for correct network representation.

Answer 1

The Correct Option is B