Mk 390

---
name: mk-390
description: "First Repeat Purchase Promotion Plan. Use when work requires repeat purchase timing and second-product arrangements; process the specified inputs using this method and verify the deliverable"
---

# MK-390 | First Repeat Purchase Promotion Plan

For ordinary chat, upload `packs/mk-390.md`, which includes the shared rules, this method, and required references

## Purpose

This skill delivers: **Repeat purchase timing and second-product arrangements**

Customer segmentation and actual eligibility to receive marketing messages are separate matters

## Required inputs

Provide: member groups, product cycles, available offers, and permission to receive messages

## Method steps

1. First identify F1 / one-time purchasers and people who made their first purchase last month
2. The core goal is to move one-time purchasers to a second purchase; the course materials give an example of a first repeat purchase within 30 days with an early-bird gift at 20 days
3. The second product need not be the same item; products with matching audience needs or product characteristics can be candidates for repeat purchase / member benefit bundles
4. Determine the actual repeat purchase cycle from the brand's products and historical data; example day counts do not automatically apply to every brand

## Calculation and interpretation

Base repeat purchase reminders on purchase cycles and contact consent; this catalog does not actually send messages

## Required output fields

| Order | Field | How to fill it in |
|---:|---|---|
| 1 | Goal | Original evidence, intermediate method results, or an explicit unknown; do not fabricate |
| 2 | Audience | Original evidence, intermediate method results, or an explicit unknown; do not fabricate |
| 3 | Plan / task | Original evidence, intermediate method results, or an explicit unknown; do not fabricate |
| 4 | Evidence and assumptions | Original evidence, intermediate method results, or an explicit unknown; do not fabricate |
| 5 | Prerequisites | Original evidence, intermediate method results, or an explicit unknown; do not fabricate |
| 6 | Resources | Original evidence, intermediate method results, or an explicit unknown; do not fabricate |
| 7 | Deliverables and acceptance | Original evidence, intermediate method results, or an explicit unknown; do not fabricate |
| 8 | Unresolved items | Original evidence, intermediate method results, or an explicit unknown; do not fabricate |

## When to use this skill and the full problem scope

Use this skill directly when the user's full objective is to arrange a first repeat purchase for F1 / one-time customers, including product cycle, second product, and reminders. First confirm they have purchased exactly once, their product / usage needs, available offers, message eligibility, and historical cycle; if information is missing, first organize viable candidates and the supporting information still needed

Schedule contact times, message content, the second product, and offer conditions around the product cycle. List the observation period, contactable one-time customers, actual contacts, valid second-purchase customers, and corresponding rates; if actual results are unavailable, deliver a fillable tracking table first

## Delivery checks for timing, messages, and results

- The timing table must cover all one-time customers in this plan. When segmenting by days since first purchase, check boundaries and continuity, including people past a suggested reminder date but not yet at the next touchpoint; list actions and conditions to pause or stop for every segment
- Reminder dates, counts, and observation windows are proposed values for this plan; state their evidence or assumptions. The median interval among repeat purchasers can be a starting assumption; retain its sample scope and then deliver a complete, adjustable schedule
- Copy may promise only products and services supported by the inputs. Check shipping, sending on a customer's behalf, packaging, freshness preservation, offers, and features individually; omit services not provided in the data and use placeholders for links
- The tracking table must list observation start / end rules, list scope, contactable people, distinct people actually contacted, distinct valid second-purchase customers, and rates. Every numerator must correspond to the same period and denominator group
- When one person receives multiple reminders, separate touchpoint records from overall deduplicated results; do not obtain the overall headcount by adding the people from each email
- Before messages are sent, leave actual results blank and explain how to fill in and interpret the table. More second-purchase customers is an observed result; incremental impact caused by messages requires suitable comparison evidence

## Verification cases

**MK-390-A1 | Customer repurchased before reminder**

Expected: Refresh eligibility and exclude from this first-repeat reminder

## Method sources

Original file: 營業額提升主要關鍵（二）社群/會員經營技巧

Source locator: members

Source basis: extracted from course materials

Original URL: https://docs.google.com/presentation/d/1ZYpstuVAXGk9KdZt1QZm2OQ7ozpYYtfrBf0Xsy7kRx8/edit

English translation of source excerpt retained in the master sheet:

> Social / member management and mobile marketing thinking