Irregular variation represents unpredictable movements caused by unusual or random events. These movements do not follow a regular pattern.
Irregular variation represents unpredictable movements caused by unusual or random events. These movements do not follow a regular pattern.
A sudden fall in sales due to an unexpected natural disaster.
Irregular variation is difficult to predict because it does not follow a fixed repeating pattern. It may appear suddenly due to strikes, accidents, epidemics, floods, or other unexpected events.
| Term | Meaning |
|---|---|
| Time Series | Data recorded sequentially over time. |
| Forecasting | Estimating future values using available information and appropriate methods. |
| Trend | Long-term general movement. |
| Seasonal Variation | Regularly repeating pattern at a known interval. |
| Cyclical Variation | Long-term fluctuations associated with broader cycles. |
| Irregular Variation | Unpredictable movement caused by unusual events. |
Forecasting Process: Problem definition → Data → Analysis → Model → Evaluation → Forecast → Monitoring.
A forecast is an estimate, not a guarantee.