Choice of best rule

Methods used involve

• finding the differences between the current states and the goal states and then
• choosing the rules that reduce these differences most effectively.
• Means end analysis good example of this.

If we wish to travel by car to visit a friend

• the first thing to do is to fill up the car with fuel.
• If we do not have a car then we need to acquire one.
• The largest difference must be tackled first.