Observations of the demand for a spare part stocked at a parts supply

EMIS 8348 Homework Assignment 1

Problem 1:

Observations of the demand for a spare part stocked at a parts supply depot during the

calendar year 2012 were

Month  Demand  Month  Demand

January  95  July  234

February  62  August  284

March  135  September 221

April  211  October  281

May  199  November 192

June  276  December 302

a. Determine the one-step-ahead forecasts for the demand for January 2013 using 3-,

6-, and 12-month moving averages.

b. Using a four-month moving average, determine the one-step-ahead forecasts for

July through December 2012.

c. Compute MAD, MSE, MAPE for the forecasts obtained in b.

Problem 2:

Observed weekly sales of ball peen hammers at the town hardware store over a ten-week

period have been 13, 11, 26, 21, 32, 13, 21, 22, 30, and 26.

a. Suppose that five-week moving averages are used to forecast sales. Determine the

one-step-ahead forecasts for weeks 6 through 10.

b. Suppose that exponential smoothing is used with a smoothing constant of α =

0.15. Find the exponential smoothing forecasts for weeks 6 through 10 (start the

forecasting process from week 1).

c. Based on the MAD, which forecast method is better?

Problem 3:

The sales of a tablet computer in a popular electronic store during the calendar year 2012

were

Month  Demand  Month  Demand

January  103  July  199

February  119  August  208

March  131  September 221

April  149  October  237

May  172  November 252

June  184  December 268

a. Using 3-month simple moving average and exponential smoothing (with α = 0.10

and 0.20), determine the one-step-ahead forecasts for July 2012 through January

2013.

EMIS 8348 Homework Assignment 1

b. Using 3-month double moving average (using base level and trend), determine the

one-step-ahead forecasts for July 2012 through January 2013.

c. Compute MAD, MSE, and MAPE for the above forecasts.

d. Based on the MAPE, which forecast method is the best?

Problem 4:

Compile a list of major system life-cycle activities. For each activity on the list, try to

find the related supply chain activities. Present your finding in a table with the system

life-cycle stage in the first column, system life-cycle activities in the second column and

the related supply chain activities in the third column.







Place your order
(550 words)

Approximate price: $22

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
$26
The price is based on these factors:
Academic level
Number of pages
Urgency
Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more

New Look, Same Us. Enjoy 10% OFF this October using the coupon code: essay10