Linked from
The 14 pages that link to Istihsan, each with the reason it gives.
FiqhRelated: It permits jurists to depart from an analogy when another justification is stronger.
IjtihadRelated: It illustrates how some legal schools qualify analogical reasoning.
Maqasid al-ShariaRelated: It can prevent formal analogy from frustrating a recognized purpose.
MaslahaRelated: It is another contested method for avoiding outcomes judged inequitable or harmful.