Solutions Operations management

Solution) Burger King is analyzing the drive-through service at their pickup window to improve efficiency duri

Question: Burger King is analyzing the drive-through service at their pickup window to improve efficiency during their evening hours.

The assistant manager keeps a record of the service times in minutes for the first four customers driving up to the pickup window each hour for a three-day period.

Management wants you to determine if there is a lack of control, using three-sigma control limits.

Customer	5:00 PM	6:00 PM	7:00 PM	8:00 PM	9:00 PM	10:00 PM	11:00 PM	12:00 AM
1	1.4	3.8	3.6	4.3	4.0	1.3	0.9	4.7
2	2.3	5.2	2.5	1.2	5.2	1.1	4.4	5.1
3	1.9	1.9	0.8	3.0	2.7	4.9	5.1	0.9
4	5.1	4.8	2.9	1.5	0.3	2.3	4.6	4.7

	5:00 PM	6:00 PM	7:00 PM	8:00 PM	9:00 PM	10:00 PM	11:00 PM	12:00 AM
1	2.8	0.5	4.5	0.6	4.8	2.7	4.2	0.9
2	3.0	2.7	1.9	1.2	2.8	2.0	1.1	4.4
3	4.1	4.7	4.2	2.7	1.1	2.6	4.4	0.6
4	4.8	3.6	0.4	2.5	0.4	2.6	3.1	0.4

	5:00 PM	6:00 PM	7:00 PM	8:00 PM	9:00 PM	10:00 PM	11:00 PM	12:00 AM
1	0.3	3.5	5.2	2.9	3.3	4.0	2.8	0.6
2	2.4	3.4	0.3	1.9	3.7	3.3	0.7	2.1
3	5.0	4.6	2.4	0.8	3.8	5.0	1.6	3.3
4	0.9	3.3	3.9	0.3	2.1	2.8	4.6	2.7