**From:** Emeka Okafor <emeka.okafor@tundemobile.ng> **Subject:** Follow-up -- next phase of churn work Hi, The churn model from last time is running and my team is actually using it -- they love having the ranked list every week. But I've been looking at the results and I have some concerns. First, the model seems to miss a lot of the prepaid customers who churn. It catches the postpaid ones pretty well but the prepaid ones slip through. My data team tells me the prepaid customers behave differently -- more erratic top-up patterns, shorter tenure. Second, I want to do this properly this time. Last time we just went straight to building. I want a proper plan -- a requirements document, an evaluation strategy before we build, the whole process. My board is asking how we measure success and I need to be able to show them a structured approach. The dataset is the same but I've added three more months of data. Same format, same columns. What I want: a better model that handles the prepaid customers properly, and I want the whole thing documented -- the requirements, why we chose the metrics we chose, the evaluation results, everything. If my board asks "how do you know this works?" I need a real answer. Emeka **Suggested message button options:** 1. "Hi Emeka, I'm on it. A few questions before I start -- can you tell me more about how the prepaid customers behave differently from the postpaid ones?" 2. "Got it. I'll start with a requirements document and evaluation plan before we touch the model. Quick question -- what specifically does your board need to see?" 3. "I've read your email. Let me profile the new data first and then we can talk about the approach."