Question

In: Operations Management

Festive Floral is gearing up for online carnation sales this Mother’s Day. They specialize in selling...

Festive Floral is gearing up for online carnation sales this Mother’s Day. They specialize in selling organic extra-large red and pink carnations. The price is $0.7 per stem, which includes free one-day shipping to the customer. Festive Floral pre-orders carnations directly from a certified organic farm at the cost of $0.15 per stem. The order is made prior to the growing season and flowers are grown accordingly, so the pre-order quantity cannot be changed. However, if Festive Floral runs out of pre-ordered carnations, they can always pick up more immediately from a local wholesaler that carries carnations of the same quality, at the price of $0.5 per stem. Historical demand for the past 10 years are given below.

Year: Red, Pink; 2008: 4008, 3288; 2009: 3948, 3648; 2010: 4092, 3636; 2011: 3984, 3684; 2012: 3996, 3792; 2013: 3888, 3720; 2014: 4128, 3564; 2015: 4104, 3744; 2016: 4380, 3828; 2017: 4392, 3744

For all questions below, please round your answers to two decimal points. Show your work by explaining the steps of your calculation.

(a) Using exponential smoothing with parameter ?? = 0.9, what is your forecast for red carnations in 2018? What is the MAD of your forecast?

(b) Based on the forecast above, what is the optimal number of red carnations to pre-order from the farm?

(c) Repeat Parts (a) and (b) for pink carnations.

Solutions

Expert Solution

price/stem

0.7

cost

0.15

cost from a local wholesaler

0.5

Demand

Year

Red

Pink

2008

4008

3288

2009

3948

3648

2010

4092

3636

2011

3984

3684

2012

3996

3792

2013

3888

3720

2014

4128

3564

2015

4104

3744

2016

4380

3828

2017

4392

3744

a) ?

0.9

Exponential Smoothing:

F(t+1)=?D(t)+(1-?)F(t)

MAD = ?|Demand-Forecast|/n

Year

Red

Forecast

|Demand-Forecast|

2008

4008

4008.00

0.00

2009

3948

4008.00

60.00

2010

4092

3954.00

138.00

2011

3984

4078.20

94.20

2012

3996

3993.42

2.58

2013

3888

3995.74

107.74

2014

4128

3898.77

229.23

2015

4104

4105.08

1.08

2016

4380

4104.11

275.89

2017

4392

4352.41

39.59

2018

4388.04

(assuming F(2008)=4008)

Forecast for red carnations in 2018=

4388.04

MAD=

94.83

b) Optimal number of red carnations:

mean demand

4092.00

std dev of demand

171.49

Overage cost (cost of overstocking), Co = Cost-Salvage value

Underage cost (cost of understocking), Cu = Selling price - cost

Co

0.15

Cu

0.55

Critical ratio, C = Cu/(Cu+Co)

C

0.79

corresponding z value

0.81

optimal number of red carnations to pre-order from the farm= mean demand + z * std dev of demand

=

4230.29

carnations

c)

?

0.9

Exponential Smoothing:

F(t+1)=?D(t)+(1-?)F(t)

MAD = ?|Demand-Forecast|/n

Year

Pink

Forecast

|Demand-Forecast|

2008

3288

3288.00

0.00

2009

3648

3288.00

360.00

2010

3636

3612.00

24.00

2011

3684

3633.60

50.40

2012

3792

3678.96

113.04

2013

3720

3780.70

60.70

2014

3564

3726.07

162.07

2015

3744

3580.21

163.79

2016

3828

3727.62

100.38

2017

3744

3817.96

73.96

2018

3751.40

(assuming F(2008)=3288)

Forecast for pink carnations in 2018=

3751.40

MAD=

110.83

Optimal number of pink carnations:

mean demand

3664.80

std dev of demand

153.49

Overage cost (cost of overstocking), Co = Cost-Salvage value

Underage cost (cost of understocking), Cu = Selling price - cost

Co

0.15

Cu

0.55

Critical ratio, C = Cu/(Cu+Co)

C

0.79

corresponding z value

0.81

optimal number of pink carnations to pre-order from the farm= mean demand + z * std dev of demand

=

3788.58

carnations

formulae used:


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