Ḥusn al-sabk denotes a well-formed composition whose parts convey the thought smoothly, coherently and effectively. Suitable ordering, syntactic connection and fluency are central to this judgment.
If the earlier poem conveys a sound idea awkwardly and the later poem gives it a more integrated form, the latter can possess genuine merit. But simply changing rhyme or order without improving expression does not establish excellence of composition.
Meter and rhyme are therefore considered alongside the semantic and syntactic structure of the statement.