Table H.1 A Worker Was Observed for Four Cycles in a Repetitive

Multiple Choice

Table H.1
A worker was observed for four cycles in a repetitive task that contains four distinct elements. The observer recorded the following items in seconds, using the snap-back method:

-The observer assigned a performance rating factor of 1.15 to the worker and the company employs an allowance factor of 20%. How many more observations must be made in order to develop an estimate of the select time for all elements of the job that are within 3% with 95% accuracy?

A) 225
B) 357
C) 440
D) 429