The difference between a newsletter and a lifecycle programme is timing. Newsletters go out when the business is ready. Lifecycle messages go out when the customer is ready: the moment they sign up, stall, succeed or start to drift away. That only works if your systems know what customers are doing.
The foundation of every lifecycle programme is a behavioural event framework: a defined set of events that capture each customer's progress, and the trigger logic that turns those events into timely, relevant messages.
What is a behavioural event?
An event is a record that a specific customer did a specific thing at a specific time: "signup completed", "first project created", "subscription upgraded". Events are sent from your product, website or payment system to your CRM or customer engagement platform, where they can start journeys, stop journeys or update a customer's segment.
Alongside events you'll have attributes (facts about the customer, such as plan, country or signup date) and signals (calculated values, such as days since last activity or number of products used). Events tell you what just happened; attributes and signals tell you who it happened to and what it means.
Organise events by lifecycle stage
The easiest way to design an event framework is to group events by the stage they represent. Here's an illustrative framework for an app with signup, verification and setup steps:
Notice the pairs of "started" and "completed" events. They're what make reactive messaging possible: if a customer has started something but not completed it within a set time, you know exactly what to remind them about.
Tracking the first few occurrences of a key action (first, second, third) is also useful. The jump from one use to three is often where a habit starts to form, and it's a natural point to introduce the next feature.
Turn events into triggers
Each lifecycle journey is defined by three types of trigger:
- Entry triggers start a journey: "signup completed" starts onboarding.
- Wait conditions check for progress: "if verification started but not completed after 4 hours, send a reminder".
- Exit triggers stop a journey when the goal is reached: "verification completed" ends the verification reminders and starts the setup journey.
Exit triggers are the ones teams most often forget, and they matter most for customer experience. Every journey should end the moment a customer does what you asked.
Write down the event specification
Events are usually implemented by product and engineering teams, so they need a clear written specification. For each event, define:
- Name: a consistent naming convention, such as "Object Action" ("Project Created"), applied everywhere.
- Definition: exactly when it fires. "When the server confirms the payment", not "when the user clicks pay".
- Properties: the extra information it carries, such as plan type, product, value or platform.
- Destination: which systems need it, such as the CRM, analytics and the customer engagement platform.
- Programmes that depend on it: so everyone knows what breaks if it changes.
Start with the events your highest-priority programmes need, rather than trying to track everything at once. A smaller set of reliable, well-defined events beats a long list nobody trusts.
Use events to power segmentation
Events also keep your segments up to date automatically. Three types of segmentation work well together:
- Behaviour-based (primary): where customers are in the journey, such as "verification incomplete", "verified, not set up" or "set up, no first action". This drives most lifecycle messaging.
- Channel-based: how customers can be reached, such as push enabled or not, and email engaged or inactive. This decides which channel carries each message.
- Engagement-based: how engaged customers are, such as high versus low intent, or active versus at risk. This helps you scale and prioritise.
A customer belongs to a segment of each type at once, so journeys can adapt: the same "finish your setup" message might go by push to one customer and by email to another.
Start small, then expand
A practical way to build an event framework:
- Map the journey from signup to activation and identify the key steps and drop-offs.
- Specify the events needed for those steps, starting with "started" and "completed" pairs at the biggest drop-offs.
- Launch the priority journeys with entry, wait and exit triggers, and a holdout group.
- Extend into the full lifecycle: usage milestones, feature adoption, inactivity signals for at-risk customers, and advocacy.
Once events are flowing reliably, the same framework powers onboarding, expansion, retention and win-back, which is why it's worth getting right first. For how to use events across channels, see Email, push or in-app?, and for onboarding specifically, Accelerating activation.