Each of these strategies help a designer to establish their design. It can help in developing ideas or define purpose when bringing an idea together.

Here are the following definitions of each strategy:

Combination: you are taking two object and creating a new object.

Juxtaposition:
This strategy highlights the differences between two objects instead of focusing on their similarities.

Isolation:
This strategy draws the attention to one object, where all other objects in the composition are neutral or separate.

Metaphor or Simile:
This strategy weighs heavily in meaning. It takes conflicting objects or symbols to imply one thing but means another. 

Change of Context/Environment:
This strategy deals with an objects natural environment or characteristics and contrasts it with objects that are not normal for its surroundings to create a new meaning.

Physical/Shape Similarity:
This strategy takes the physical similarities between two objects and brings out the relationships that are not natural depictions.   

Material Change/Swap/Focus:
This strategy uses the material qualities of an object then modifies it with a new physical material to give new meaning.