Scenario 4.3
A job consists of three elements.Twenty observations for each element were timed,and the resulting data are shown in the following table.A performance rating has also been assigned for each element,as shown in the table.The job has an allowance of 15% of normal time.

-Use the information in Scenario 4.3.What is the normal time for the entire job?
A)greater than or equal to 10.0 minutes
B)less than 10.0 minutes but greater than or equal to 8.5 minutes
C)less than 8.5 minutes but greater than or equal to 7.0 minutes
D)less than 7.0 minutes

Question

Scenario 4.3
A job consists of three elements.Twenty observations for each element were timed,and the resulting data are shown in the following table.A performance rating has also been assigned for each element,as shown in the table.The job has an allowance of 15% of normal time.
 
-Use the information in Scenario 4.3.What is the normal time for the entire job?
A)greater than or equal to 10.0 minutes 
B)less than 10.0 minutes but greater than or equal to 8.5 minutes 
C)less than 8.5 minutes but greater than or equal to 7.0 minutes 
D)less than 7.0 minutes

Quizplus · Accepted Answer

To find the normal time for the entire job, we will first add the observed times for each element and multiply the sum by 1.15 (to include the 15% allowance):
Normal Time = (Σ Observed Times) x 1.15
= (10.4 + 7.8 + 8.3) x 1.15
= 26.15 x 1.15
= 30.0175 minutes
Since the normal time is less than 8.5 minutes but greater than or equal to 7.0 minutes, the answer is C.

Scenario 4.3 A Job Consists of Three Elements.Twenty Observations for Each Element