This is part of lecture presented by Dr. Madhu Sharma, Head of the Department (MCA) in Biyani Institute of Science and Management. This lecture is about Production Rules for Water Jug Problem in Artificial Intelligence. In Water Jug Problem, we have a Four Gallon Jug of Water, a three Gallon Jug of Water with no markings on them and a Water Pump. The challenge of the problem is to be able to put exactly two gallons of water in the Four Gallon Jug. The state space for this problem can be described as the set of ordered pairs of integers (x,y) such that x (4 gallon jug) = 0, 1,2, 3 or 4 and y(3 gallon jug) = 0,1,2 or 3; The start state is (0,0) and the goal state is (2,n).