Following Wimsatt, mechanists have detailed several kinds of organization characteristic of mechanisms. A canonical list includes both spatial and temporal organization. Spatial organization includes location, size, shape, position, and orientation; temporal organization includes the order, rate, and duration of the component activities. More recently, mechanists have emphasized organizational patterns in mechanisms as a whole. Bechtel, for example, discusses how mathematical models, and dynamical models in particular, are used to reveal complex temporal organization in interactive mechanisms (Bechtel 2006, 2011, 2013b). Some argue that dynamical models push beyond the limits of the mechanistic framework (e.g., Chemero and Silbestein 2008 and, at times, Bechtel himself; see Kaplan and Bechtel 2011). Others argue that dynamical models are, in fact, often merely descriptive (i.e., non-explanatory models) or, alternatively, that they are used to describe the temporal organization of mechanisms (Kaplan and Bechtel 2011; Kaplan 2012).