A theory recently confirmed may have to be reviewed tomorrow. Nothing works everywhere. There is always more than one thing that works in any one place. Pastors in congregations learn how to lead in the postmodern era through different processes than did their predecessors. Pastors can't learn how to lead in one way and then continue leading that one way in every parish they serve.
Effective leaders learn all they can.
They listen to people in other organizations for ideas. However, good leaders avoid copying. The assumption that what works will work anywhere is not valid. The church is a system of processes working together toward a common aim. The entire denomination is a system, and each congregation is a system.