The following observations of actual time taken by worker for doing a job repeatedly was taken by a time study observer are: Observation 1 2 3 4 5 6 No. Times in 0.2 0.3 0.4 0.6 0.4 0.2 Minutes The ratings were found to be as follows: Skill Good 1 Effort Excessive A1 Condition Excellent B. Consistency Poor F Determine the normal time or basic time for the element under observation. Westing house system of Performance Rating Table Skill Effort Conditions Consistency Super Excessive Ideal Perfect A, = + 0.15 A, +0.13 A = +0.06 A+ 0.04 A2 = +0.13 A2 = + 0.12 Excellent Excellent Excellent Excellent B = + 0.11 B = + 0.10 B = +0.04 B= + 0.03 B2 = + 0.08 B2= + 0.08 Good Good Good Good Ci = + 0.06 C = + 0.05 C = + 0.02 C= + 0.01 C2 = +0.03 C2= +0.02 Average Average Average Average D = 0.00 D = 0.00 D = 0.00 D= 0.00 Fair Fair Fair Fair E, = 0.04 E = -0.04 E= -0.03 E= -0.02 E2= -0.10 Ez = -0.08 Poor Poor Poor Poor F1 - -0.16 F1 = -0.12 F1 = -0.07 F= -0.04 F2 = -0.22 F2 = -0.17