It might help to pose two caricatures hypothetical extremes. One is engineering as problem solving, the other is design as creating.

The designer wants to create a solution that fits in a deeper situational or social sense.

Design is messy. Engineering… is not supposed to be messy. The designer can handle the messiness and ambiguity and is willing to trust intuition.

Successful design is done in teams.

David Kelly (via kimmalexis)