Complex sentence: Koberg and Bagnall's wrote "The All New Universal Traveller" in 1972 and showcase a circular seven-step process to problem-solving; although they also proposed that these seven steps could be done lineally or in feed-back loops.
Split into simpler sentences: Koberg and Bagnall's wrote "The All New Universal Traveller" in 1972 and presented a circular, seven-step process to problem-solving. These seven steps could be done lineally or in feed-back loops.