The forecasting methods used are a combination of quantitative and qualitative methods.
The supply projections are dominantly quantitative, the demand projections are a mixture of quantitative and qualitative methods.
The qualitative methods used are Delphi and consumer panels.
For example, a group of international research experts experienced in the field of substitution were invited to debate on the best way to carry out research into substitution ratios. The conclusions drawn from this conference indicated that quantitative methods such as time-and-motion measurements should be complemented with qualitative insights.
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