An industrial operation consists of five elements with following observed times 

and the performance ratings:

Elements Observed Time 

(min)

Performance Ratings 

(%age)

1 0.15 80

2 0.20 85

3 0.10 90

4 0.12 75

5 0.25 80

Assuming rest and personnel allowances as 12% and contingency allowance as 4% 

of the normal time. Calculate standard time per piece.

Transcribed Image Text:

An industrial operation consists of five elements with following observed times and the performance ratings: Elements Observed Time (min) Performance Ratings (%age) 1 0.15 80 2 0.20 85 3 0.10 90 4 0.12 75 0.25 80 Assuming rest and personnel allowances as 12% and contingency allowance as 4% of the normal time. Calculate standard time per piece. An industrial operation consists of five elements with following observed times and the performance ratings: Elements Observed Time (min) Performance Ratings (%age) 1 0.15 80 2 0.20 85 3 0.10 90 4 0.12 75 0.25 80 Assuming rest and personnel allowances as 12% and contingency allowance as 4% of the normal time. Calculate standard time per piece.