In a quilling production, an operator is assigned 50 spindles. The mean machine running time per package determined by stopwatch study, is 200 minutes. The standard mean servicing time per package, also developed by time study, is 4 minutes.

Using Wrights formula, the percent (%) of machine interference time is:

	A.	925%
	B.	1,050%
	C.	452%
	D.	1,254%

Using Wrights formula, the machine interference time (in minutes) is:

	A.	39.4 minutes
	B.	12.6 minutes
	C.	24.3 minutes
	D.	18.1 minutes

QUESTION 3

Using Ashcrofts method, the value of i found in the table is:

	A.	16.8% (0.168)
	B.	4.3% (0.043)
	C.	8.7% (0.087)
	D.	2.2% (0.022)

QUESTION 4

Using Ashcrofts method, the machine interference time (in minutes) is:

	A.	12.7 minutes
	B.	19.4 minutes
	C.	28.1 minutes
	D.	23.5 minutes