Dan's Auto Detailing business performs two major activities: exterior cleanup, and interior detailing. Based on the size of car and condition, time estimates for six cars on Monday morning are as shown in the accompanying table.

(a) Sequence the cars so that all exterior detailing is done first and total completion time is minimized.
(b) Draw a Gantt chart and evaluate the idle time.

Transcribed Image Text:

Car Number 1 234 56 Exterior 50 3590 6545 80 Interior 30 40 20 45 25 55