Hi there,can you gusys share some detailed info about SPECULATIVE DESIGN?

Hi,Im a industrial student from usst China,and recently Ive to begin my final design.Occasionally Ive know few things about SPECULATIVE DESIGN .But theres no enough information could be collected on the internet.So,if anyone can tell me some details about that,such as the differences of design process between a traditional design and a speculative design or how to do a speculative design.Thx you guys a lot.

WHAT ARE SPECULATIVE DESIGN JOBS FOR ID?