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Forecasting 2 period moving average

Input Data Forecast Error Analysis

Period Actual Value Forecast Error

Absolute

error

Squared

error

Absolute

% error

Period 1 4

Period 2 8

Problem 11-13(a)

Forecasting 3 period moving average

Input Data Forecast Error Analysis

Period Actual Value Forecast Error

Absolute

error

Squared

error

Absolute

% error

Period 1 4

Period 2 8

Period 3 6

Period 4 6 6.000 0.000 0.000 0.000 0.00%

Period 5 9 6.667 2.333 2.333 5.444 25.93%

Problem 11-13(a)

Forecasting 4 period moving average

Input Data Forecast Error Analysis

Period Actual Value Forecast Error

Absolute

error

Squared

error

Absolute

% error

Period 1 4

Period 2 8

Period 3 6

Problem 11-13(a)

Forecasting 3 period weighted moving average

Input Data Forecast Error Analysis

Period Actual value Weights Forecast Error

Absolute

error

Squared

error

Absolute

% error

Period 1 4 1

Period 2 8 1

Period 3 6 2

Problem 11-13(b)

Forecasting Exponential smoothing

Input Data Forecast Error Analysis

Period Actual value Forecast Error

Absolute

error

Squared

error

Absolute

% error

Year 1 4 6.000

Year 2 8 5.200 2.800 2.800 7.840 35.00%

Problem 11-13(c)

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