Tell us a question you need help with The Arkade Company has

Tell us a question you need help with

The Arkade Company has decided to use a 15 percent allowance factor based on job time. Calculate the standard time for each work element and for the total job. The frequency equals 1 for all work elements.

(Round your answers to 3 decimal places, the tolerance is +/-0.002.)

Work Element

Mean Observed Time (minutes)

Perfomance Rating Factor

ST

Work Element	Mean Observed Time (minutes)	Perfomance Rating Factor	ST
1	1.20	0.95
2	1.00	0.85
3	0.80	1.10
4	0.90	1.10

Solution

Mean allowance = 15%

|z| for 98% = 2.33

pq/n = variance = 0.15(0.85)/1

Std dev = 0.357

Hence std time for each element and total job = [15-2.33(0,.357)15+2.33(0,.357)]

= (14.168,15.832)