Which method of forecasting is based on opinion or judgment?

Subjective forecasting methods rely on the opinions and judgments of individuals or experts rather than purely on statistical analysis or historical data. This type of forecasting is particularly useful in situations where there may be limited data available or when future events are uncertain, allowing for human intuition and expertise to play a critical role in the forecasting process.

In contrast, methods like time series analysis, simple moving average, and weighted moving average are all based on systematic approaches that utilize past data trends to predict future outcomes. These methods emphasize patterns and quantitative data rather than personal judgments or opinions, making them inherently different from subjective forecasting.