Gnatt chart

bin chart

Emerson chart

travel chart

primary cost

factory cost

factory expenses

primary cost + factory expenses

actions of operator

layout of work place

tooling and equipment

all of the above

greater

smaller

equal

there is no such correlation

permits a fine breakdown of activities and delays

simultaneous study of many operators may be made by a single observer

calculations are easier, method is economical and less time consuming

no time measuring devices are generally needed