Identification of decision rules

When our entire morphological tree is constructed, the final stage— acquiring formal knowledge in the form of decision rules—begins. We know changes in the values of symbolic attributes occurring horizontally 

Let us reveal four decision rules that can be deduced from our decision tree. We could formulate such decision rules as 

The engineering interpretation of this decision rule will be 

If the root type of a diesel engine is insufficient, then evolve the root type by adding to the engine a single turbocharger. 

If Ai = 0 and A2 = Regular Fuel are insufficient then make A2=Low Emission Fuel. 

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