Community Health Index

Intriguing list of health factors for communities, created by Lithium:

Responsiveness – A measure of time to respond between successive message posts within a thread taking into account expected response time
Interaction – The number of unique participants weighted by the amount of conversation between them within a thread
Liveliness – A function of the number of posts per board over time taking into account user expectations for engagement
Members – The number of registered members over time
Content – A function of posts weighted by member and guest viewership
Traffic – The number of page views over time taking into account search crawlersâ€

[ via Lithium ]