Statistical growth X Personal spirituality = effectiveness
-OR-Fruitfulness x Faithfulness = effectiveness
This, he suggested, is how we measure our job success. In this scenario, effectiveness is a multiple of numbers and spirituality.
A good bit of this is the assembly line model of ministry management inherited from the previous century. It leaves me empty and uninspired. And it doesn't seem to hold up to Eugene Peterson's still prophetic attack of the clergy success syndrome in Working the Angles. That was the 1980's. Where are the prophets of clergy spiritual dearth today? The grad-grinds of effectiveness, using their graphs and charts to substantiate numbers, have clearly won the day.
Pastor as spiritual guide or healer takes an easy back seat when I need to prove myself. No surprise that stuff like personal health, well-being, balance, relationships, sanity, and sabbath also take a back seat. The current race to find and equip younger clergy? Younger clergy are cheaper for local churches, and denominations don't have to worry about paying their pensions for many years.
Older clergy, though, can bring a discernment and wisdom and spirituality- all the stuff that the years have taught us, if we let them. That includes seeing the numbers in perspective. But the church that values the ecclesiastical equivalent of assembly-line efficiency, calling it effectiveness, has very limited time and space for a wounded healer, so, no thanks, Henri Nouwen! We need more and younger bodies to feed the process. More food for the fodder.
Such is the problem with the business model. When we have to prove we're doing it, like the state exams for school children, we focus not on true vocation and gifts, but on standardization with all things being equal. But all things are not equal.