  We describe two ways to define higher order Toda brackets in a pointed
simplicial model category $\mathcal{D}$: one is a recursive definition using
model categorical constructions, and the second uses the associated simplicial
enrichment. We show that these two definitions agree, by providing a third,
diagrammatic, description of the Toda bracket, and explain how it serves as the
obstruction to rectifying a certain homotopy-commutative diagram in
$\mathcal{D}$.
