A specification of the principal objectives for individual network sections is realized through following performance requirements and measurable cleaning objectives outlined in [[EN14654-1:2005]] and [[ASCE 2019]]:

• Restoration of the flow capacity to the nominal design value;

• Removal of deposits and debris up to a prescribed level;

• Limitation of the build-up of sediments to prescribed levels;

• Limitation of the deposits to existing levels (maintaining a balance in the sediment movement);

• Prevention of the solidification of deposits and agglomerations;

• Limitation of the deposit level to maintain pipe capacity and limit overflows within predicted frequencies;

• Removal of sufficient deposits to avoid significant flow limitations.