æz ɪn ˈɔːl ˌɛndʒɪnˈɪɹɪŋ, ðɪs ɪnvˈɑːlvz tɹˈeɪdɔfs ðə nˈɛtwɜːk mˈʌstɐv ˈædɪkwət pɚfˈoːɹməns, biː səfˈɪʃəntli ɹᵻlˈaɪəbəl, bˌʌt ʃˌʊd nˌɑːt jˈuːz mˈoːɹ ɹᵻsˈoːɹsᵻz ðɐn ɹᵻkwˈaɪɚd.
As in all engineering, this involves tradeoffs - the network must have adequate performance, be sufficiently reliable, but should not use more resources than required.