Building block, Genetic algorithm,

A connected important issue for genetic algorithms might be the order of the encoded building blocks. In the previous examples, the order for all building blocks was completely accidental as shown for B in figure 6. It may be helpfiil to pre-sort A, B and C on the axis of the search space... 

Forrest, M. and Mitchell, M. Relative building-block fitness and the building-block hypothesis. In Foundations of Genetic Algorithms 2, Ed. Whitley, D., Morgan Kaufmann, San Mateo, CA, 1993, pp. 109-126. 

Selection algorithms must be able to select building blocks in a way that an optimized set of products is generated by combinatorial explosion. Genetic or evolutionary algorithms are most commonly used for this optimization step [70, 101, 109, 130]. 

Fig. 15 Derived building blocks from a clustered virtual library by an iterative algorithm (e.g., a genetic algorithm). The cycle must be repeated until the final library satisfies the required criteria.

---