# Test prediction before your event

### Send reads

Send reads from your timing system to RACEMAP using either test data or a live setup, e.g. decoder and transponder in your office. 

Check in the reads tab of the prediction dashboard: The smaller the difference between *READ AT* and *RECEIVED AT* timestamps, the better the data for live tracking.  

* Positive difference: Delay in forwarding the reads from the timing system to RACEMAP. Minimize the delay for a good prediction.
* Negative differences - reads appearing to come from the future: This indicates an incorrect time / date setting at your hardware or in the timing system. 

<figure><img src="/files/pV8JuetUNnzyFJzndFs8" alt=""><figcaption><p>Green - very good: Small difference, Red - not usable data: Huge difference</p></figcaption></figure>

### Prediction recap using recorded timing data <a href="#prediction-recap" id="prediction-recap"></a>

Create a past event in RACEMAP that you've already timed, then resend the recorded timing data from the timing system to RACEMAP. For testing and training, this approach is more effective and realistic than simulations with synthetic data. If you already have a specific event in mind where you want to offer predictive tracking, we recommend using recorded real race data from that event.&#x20;

Workflow:&#x20;

* Create an event in RACEMAP where the start and end times are in the past - trial, no activation required
* Import or synchronize the participant data of that past event
* Re-send the recorded timing data to RACEMAP

This allows you to visualize participants moving on the map in replay mode. At the same time, we can analyze and validate the prediction quality based on real race data. This approach requires less effort and delivers more meaningful results than testing with purely synthetic data. This ensures you are fully prepared and confident for your upcoming production event.


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