Production and Operations Analysis, Seventh Edition
Production and Operations Analysis, Seventh Edition
7th Edition
ISBN: 9781478623069
Author: Steven Nahmias, Tava Lennon Olsen
Publisher: Waveland Press, Inc.
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Chapter 2, Problem 57AP

(a)

Summary Introduction

To determine: Comparison of accuracy of forecasts made applying Trigg-Leach method and the MAD to given data with simple exponential smoothing forecasts.

Introduction: Holt’s method involves inaccuracy of forecasted value represented by error parameters MAD and MSE. Trigg-Leach method makes use of smoothed error tracking signal. 

(b)

Summary Introduction

To explain: The relationships among Trigg-Leach method, Time series and the circumstances where these methodsare suitable and where not.

Introduction: Trigg-Leach method introduced tracking signal which can determine the accurate difference between absolute error and observed error. This results in unbiased forecasts.

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