an ordinary event

a significant event representing some mile-stone

an event to be transferred to other network chart

dangling event

consumes time, but no resources

consumes resources but no time

consumes neither time nor resources

is a dangling event

maximum slack

minimum slack

average slack

no slack

increases continuously

decreases continuously

remains constant

may increase or decrease depending on various factors

a project will always be behind schedule, if left uncorrected

cost of project will always be more than the estimated cost, if no timely corrections are taken

a project can be subdivided into a set of predictable, independent activities

activities are fixed and can′t be changed ,