Question

QRS Corp. is designing a product layout for a new product. They plan to use this production line 10 hours a day in order to meet forecasted demand of 900 units per day. The following table describes the tasks necessary to produce this product:

Task	Time(secs)	Immediate
		Predecessor
a	34	none
b	20	a
c	10	b
d	16	b
e	10	c
f	24	d,e
g	38	f

For output to equal forecasted demand, what will be the second task performed at the second workstation of the production line that uses the fewest number of stations?

a

b

c

d

e

Answer 1

Total Available time = 10 hour

Demand = 900 units /10 hour = 90 units / hr

Cycle time = 60*60/90 = 40 sec.

Total Task time = 152 seconds

Theoretical minimum number of workstations = Total Task time / cycle time = 152 / 40 =3.8 = 4

The work allocation is as follows.

Work Station	Tasks	Time	Idle time
1	a	34	6
2	b,c,e	40	0
3	d,f	40	0
4	g	38	2

From above, The required task is C,