A systematic observation and recording of activities of one or more individuals at random interval is done in -: (A) System analysis, (B) Network analysis, (C) Work sampling, (D) Input-output analysis
Answer is B. A network analysis is a graphical plan of all events and activities to be completed inorder to reach an end objective.It brings greater discipline in planning.Two common types of network techniques are PE CPM(refer pgno:872 park 23 rd edition)