The document discusses several models for forecasting new product sales, including:
- Parfitt & Collins model which predicts share based on trial, repeat rates, and buying rate.
- Fourt-Woodlock model which estimates volume as a function of cumulative trial, repeat percentage rates by depth of repeat, and buying rate.
- Assessor model which evaluates new product appeal among different consumer segments through in-person interviews.
It also describes the Hendry market structure model which integrates factors like category share/loyalty, available switchers, and new product effectiveness to forecast share. Bases model measures purchase interest, transaction size, and frequency to estimate unit sales.