Reduction rules for SOP using K-map • Prepare the truth table for the function • Draw an empty K-map • Fill the cells with value 1 for which the output is 1 • Fill rest of the cells with value 0 • Mark the Octets, Quads and Pairs by encircling the value 1s (also check map rolling, overlapping groups and remove redundant groups) • Write the final reduced expression and OR (+) them to get the answer