Diagnosis
The system needs the following in order to be able to test for aseasonal and/or trend pattern in the historical data:
Test description ,,Periods/seasons required
Seasonal test ,,2 seasons
Trend test ,,3 periods
Seasonal trend test ,,2 seasons
Trend model with ,,3 periods + 1 season
seasonal test ,,

System Response
Neither a seasonal nor a trend test can be carried out because theabove requirements are not fulfilled.