Schmitt's classification of design methods includes routine, creative, and innovative design methods, each representing different approaches to the design process.
The routine design method involves repetitive tasks based on established norms and standards, typically used for small-scale or low-complexity designs. The creative and innovative design methods involve more original and flexible approaches, often seeking novel solutions to complex problems.
"Craft design method" is not part of Schmitt’s classification. Craftsmanship is a different concept that involves the manual and artistic skills in the creation of objects, rather than a formal approach to the design process.