2.Case Problem: R. C. Coleman

R. C. Coleman distributes a variety of food products that are sold through grocery store and supermarket outlets. The company receives orders directly from the individual outlets, with a typical order requesting the delivery of several cases of anywhere from 20 to 50 different products. Under the company's current warehouse operation, warehouse clerks dispatch order-picking personnel to fill each order and have the goods moved to the warehouse shipping area. Because of the high labor costs and relatively low productivity of hand order-picking, management has decided to automate the warehouse operation by installing a computer-controlled order-picking system, along with a conveyor system for moving goods from storage to the warehouse shipping area.

Activity	Description	Immediate Predecessors
A	Determine equipment needs
B	Obtain vendor proposals
C	Select vendor	A, B
D	Order system	C
E	Design new warehouse layout	C
F	Design warehouse	E
G	Design computer interface	C
H	Interface computer	D, F, G
I	Install system	D, F
J	Train system operators	H
K	Test system	I, J

	Time (weeks)
Activity	Optimistic	Most Likely	Pessimistic
A	5	7	9
B	7	9	17
C	3	5	7
D	9	11	25
E	8	11	14
F	5	7	9
G	5	7	21
H	3	5	7
I	5	7	15
J	1	2	3
K	3	5	7

Develop the activity schedule.

Activity	ES	LS	EF	LF