The go-to number in American religion is “ASA” — average Sunday attendance. Or as an irreverent colleague put it, “Fannies in the pews.”
It’s a meaningless metric, but it’s easy. Open the doors on Sunday, wait for the stragglers, then dispatch ushers to count the house.
Entire methodologies for church development have been built around this number, as if fanny count dictated how a church should behave. Problem is, ASA isn’t a useful measure of quantity, and it says nothing about quality.
A much better quantitative measure would get at “touches,” that is, how many lives are being touched by contact with the faith community in its various Sunday, weekday, off-site and online ministries — and then, for a qualitative measure, asking how those lives are being transformed.
Those are difficult metrics to track, of course, and that’s why many congregations stick to ASA and shun the harder work of measuring outcomes and impact.