It is only those obligations arising from past events that exist independently of the enterprise’s future actions (i.e. the future conduct of its business) that are recognised as provisions. For example, an enterprise may believe that the cost of cleaning up a site at the end of its life will be reduced by future changes in technology. The amount recognised reflects a reasonable expectation of technically qualified, objective observers, taking account of all available evidence as to the technology that will be available at the time of the clean-up. Thus, it is appropriate to include, for example, expected cost reductions associated with increased experience in applying existing technology or the expected cost of applying existing technology to a larger or more complex clean-up operation than has previously been carried out. However, an enterprise does not anticipate the development of a completely new technology for cleaning up unless it is supported by sufficient objective evidence.