Assign small random variable to weight (-0.5 to +0.5) Use feed forward method to calculate o/p(yk) by supply inputs calculate delta for o/p layer (dk=(tk-yk)f(yink) calculate delta for hidden layer dj = dinj f'(zinj) | dinj=sum(dk,wjk) calculate dw, dwij=axi,di | dwjk = azj,dk adjust neuron weight wif(new)=wij(old) + dwij | wjk(new)=wjk(old) + dwjk Repeate from step2 until supplied cycyle threshold level