Making Use of Deleuze in Planning translates and re-creates some of Gilles Deleuze’s most abstract philosophical concepts to form a new, practicable planning assessment tool. It shows what his philosophy can do for planning theory as well as planning assessment practice and, in doing so, sets out a pragmatic approach to Deleuzian studies: one that helps form bridges between ontological problems and the problems found in professional practice. It also breaks new ground in assessment methodology by challenging the essentialist ideas underpinning assessment methods like BREEAM and setting out and testing a new form of non-essentialist assessment named SIAM. The book argues that Deleuze’s philosophy can be made useful to planning as long as one is prepared to adapt and re-create his key ontological concepts to respond to the specific demands of the field.