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How to enter parameters for Exponential Smoothing in Time Series models

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Question

I wish to estimate an Exponential Smoothing model in IBM SPSS Statistics and specify values for the model parameters, such as the smoothing constant (alpha). I have chosen Analyze->Forecasting->Create Models in the menu system and chosen Exponential Smoothing in the Method scrollbar of the "Time Series Modeler" dialog. I then clicked the Criteria button. In the "Exponential Smoothing Criteria" dialog, I can check radio buttons for "Model Type" and "Dependent Variable Transformation", but I see no option to enter smoothing parameter values. There were no apparent keywords for this function in the syntax chart for the TSMODEL command. How can I specify values for parameters in the model?

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Modified date:
17 June 2026

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swg21590207

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