The length of the arrows in a PERT diagram has a direct relationship with the duration of the activity.( )
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The critical path is defined as the most expensive path.( )
PERT diagrams occasionally need to use dummy activities to preserve the logic.( )
Risk is a rough assessment of whether there may be problems or difficulties developing the use case.( )
Middle managers are highly dependent on information from external sources that supply news of market trends and the strategies of competing corporations.( )