For example, the construction engineer estimates the cost of a project by combining calculated costs with those that can only be predicted. In these two examples the opinion is the result of applying judgment developed from previous situations. Going directly to the result on the basis of experience but without any conscious reasoning is called intuition. Intuition is employed many times each day by every one of us. For example, the driver of a passenger car approaching an intersection at the same time as a trucker does not employ a calculator to determine who has the right of way.
Intuition based on experience has an important place in engineering.
On the other hand, hunches or unjustified intuition are not acceptable.