The following table shows where ES can be applied.
| Application | Description |
| Design Domain | Camera lens design, automobile design. |
| Medical Domain | Diagnosis Systems to deduce cause of disease from observed data, conduction medical operations on humans. |
| Monitoring Systems | Comparing data continuously with observed system or with prescribed behavior such as leakage monitoring in long petroleum pipeline. |
| Process Control Systems | Controlling a physical process based on monitoring. |
| Knowledge Domain | Finding out faults in vehicles, computers. |
| Finance/Commerce | Detection of possible fraud, suspicious transactions, stock market trading, Airline scheduling, cargo scheduling. |