Which of the following factors contributes to the complexity of nontraditional machining processes?

The complexity of nontraditional machining processes is significantly influenced by surface damage concerns associated with conventional machining. Nontraditional machining methods, such as electrical discharge machining (EDM) or laser cutting, are often developed to overcome limitations faced by conventional machining processes, particularly when it comes to handling difficult materials or intricate designs without causing surface damage.

Conventional machining, which often involves cutting tools that may produce significant wear on the workpiece, can lead to issues such as thermal distortion, residual stresses, or microstructural changes, impacting the final quality of the machined surface. Nontraditional methods are better equipped to deal with these surface integrity challenges as they typically do not involve mechanical forces that could damage the material.

On the other hand, the remaining factors do not inherently contribute to the complexity of these processes in the same impactful manner. The use of advanced computer systems might enhance the precision and control of machining but does not add to complexity in the same way that concerns about surface integrity do. The ability to process only metal materials is a limitation rather than a complexity factor, and the requirement for simplistic designs counterintuitively simplifies processes rather than complicates them.