Ie 271 Exam 2

Front 1

Number of cycles

(time study)

Back 1

n=[ts/kx]^2

Front 2

Need for performance rating

Back 2

to determine the quality of work being observed for operator

Front 3

Westinghouse performance rating system

Back 3

skill, effort, conditions, consistency

Front 4

Foreign elements

Back 4

not part of operation or elements

Front 5

Three allowance types

Back 5

personal

basic fatigue

variable

Front 6

Personal allowance

Back 6

Restroom and water breaks, affected by environmental conditions (heat, cold), 5% is typical

Front 7

Basic fatigue

Back 7

accounts for variability in work pace, 4% is typical

Front 8

Variable fatigue

Back 8

less than optimal work conditions stress a worker physiologically, psychologically, or both ways

Front 9

Continuous watch method

Back 9

continues, time still increments

Front 10

Snapback watch method

Back 10

resets to zero each press

Front 11

Determining allowances

Back 11

know how much allowance to give workers based on conditions, severity of labor, and for unexpected events

Front 12

Time study vs motion study

Back 12

a time study observes workers to determine productivity and time standards

a motion study uses a video camera to analyse the motion and posture of an operator during work

Front 13

Determine time standards

Back 13

work content time*performance rating*allowance

Front 14

Learning curves

Back 14

learning curves quantify decrease in task performance time, as function of task repetition

Front 15

Calculating learning curves

Back 15

Y_X = KX^n

Front 16

Advantages of predetermined time systems

Back 16

eliminate need for performance rating

estimate production capacity

develop effective methods prior to production

Front 17

Predetermined time system

Back 17

standard data systems for determining standard times for basic elements of work

Front 18

General move sequence

Back 18

unrestricted movement of objects through air

ABG ABP A

Front 19

Controlled move sequence

Back 19

objects movement path is defined or restricted

ABG MXI A

Front 20

Tool use sequence

Back 20

for use with hand tools, hands as tools, or brain as tool

ABG ABP .. ABP A

Front 21

# of operators

(Line balancing)

Back 21

standard time/R

Front 22

Calculating R and J

(Line balancing)

Back 22

R=min/unit

J=unit/min

Front 23

True # of operators

(Line balancing)

Back 23

round the exact # of operators up 1 regardless of decimal

Front 24

Effective standard time

(Line balancing)

Back 24

standard time/true # of operators

Front 25

Efficiency

(Line balancing)

Back 25

Total standard time/Actual time (largest st multiplied by # of workers)

Front 26

Expected values

(Pert)

Back 26

1/3(2m+.5(a+b))

Front 27

Variance

(Pert)

Back 27

((1/6)(b-a))^2

Front 28

Latest start

(Pert)

Back 28

Latest finish-duration

Front 29

Earliest finish

(Pert)

Back 29

earliest start+duration

Front 30

Total float

(Pert)

Back 30

latest start-earliest start