Dave Grubbs of Grubbs Auto Body has ﬁve cars waiting for Economy Detailing. An Economy Detailing consists of a wash and then a hand wax. Cars cannot be waxed until they are washed. ROUND UP (39/5) & (39/10). Wash (hours)Wax (hours)(J)aguar39/55(C)adillac53(F)ord139/10(H)onda21(L)exus44What schedule produces the shortest time span in which these orders can be completed?Sequence: ____ , _____ , _____ , ______ , ______ Create a Gantt chart for the optimal sequence (shortest time span). How many hours does it take to complete the ﬁve orders? For the schedule in question “a”, how many hours is the waxing task idle? When will Dave ﬁnish the Cadillac? What is the average order completion time?

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Practical Management Science

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ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

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Dave Grubbs of Grubbs Auto Body has ﬁve cars waiting for Economy Detailing. An Economy Detailing consists of a wash and then a hand wax. Cars cannot be waxed until they are washed. ROUND UP (39/5) & (39/10).

	Wash (hours)	Wax (hours)
(J)aguar	39/5	5
(C)adillac	5	3
(F)ord	1	39/10
(H)onda	2	1
(L)exus	4	4

What schedule produces the shortest time span in which these orders can be completed?

Sequence: ____ , _____ , _____ , ______ , ______

Create a Gantt chart for the optimal sequence (shortest time span).

How many hours does it take to complete the ﬁve orders?

For the schedule in question “a”, how many hours is the waxing task idle?

When will Dave ﬁnish the Cadillac?

What is the average order completion time?

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