Material Spike
Single Sunday exceeds 8-week avg by >=12%; signals church action caused growth.
A material spike occurs when a single Sunday's attendance exceeds the 8-week rolling average by 12% or more. Kingdom Metrics flags these automatically because they often correspond to intentional church actions — a sermon series launch, community outreach event, special guest speaker, or targeted invite campaign.
Not every spike is meaningful. Easter and Christmas naturally produce high-attendance Sundays that are classified separately as growth drivers. A material spike, by contrast, highlights unexpected or program-driven surges outside of the calendar-driven peaks.
Why it matters for your church: Material spikes are a feedback loop for your programming decisions. When Kingdom Metrics flags a spike, you can look back at what your church did differently that week and determine whether it is worth repeating. Over time, tracking which actions produce spikes — and which do not — gives you an evidence-based playbook for growth.