This property identifies a specific instance of E29 Design or Procedure in order to carry out an instance of E7 Activity or parts of it. The property differs from P32 used general technique (was technique of) in that P33 refers to an instance of E29 Design or Procedure, which is a concrete information object in its own right rather than simply being a term or a method known by tradition. Typical examples would include intervention plans for conservation or the construction plans of a building.

This property generalises relationships like whole-part, sequence, prerequisite or inspired by between instances of E29 Design or Procedure. Any instance of E29 Design or Procedure may be associated with other designs or procedures. The property is considered to be symmetrical unless otherwise indicated by P69.1 has type. The P69.1 has type property of P69 has association with allows the nature of the association to be specified reading from domain to range; examples of types of association between instances of E29 Design or Procedure include: has part, follows, requires, etc. The property can typically be used to model the decomposition of the description of a complete workflow into a series of separate procedures.