**Intervention Lens** is a graph view on **Analyze → Dashboard**. It puts a strategy against the outcomes you logged — how often a behavior happened before and after the first day that strategy appears in your dates.

You pick the strategy, and you pick the behavior category to measure.

It counts **how many times** something was logged (events per day). Duration is not used here.

This chart is on the **website**.

## Before you start

Staff log strategies on the daily **Behavior** tab, in a strategy category — by default **Intervention Strategies**. See [Logging a behavior](https://support.behca.com/hc/behca-support/articles/logging-a-behavior).

The chart needs at least one strategy logged in your dates. If **no** strategy category has anything logged in these dates, the page says **No strategies logged in this date range.**

## Pick a strategy and what to measure

1. Choose a **STRATEGY** from the dropdown. Each option is one strategy **name** (for example *Redirected to a quiet area*), and you look at **one strategy at a time**. The list shows how many times it was logged in this range and the first date it appears here — for example `Redirected to a quiet area (3x since Aug 4, 2026)`. Only names logged in these dates are on the list. Switch strategies to compare them.
2. Choose one category under **MEASURED AGAINST**. That is the category in the big chart. The page opens on **Challenging Behavior** when that category is available, otherwise **Warning Behavior**. The smaller charts below cover the other categories.

**MEASURED AGAINST** lists the behavior categories that are not marked as strategies — Desirable, Challenging, Warning, and your custom ones. To hide one from this list, a manager opens that category (not a strategy category) and sets **Success defined by** to **N/A — not used with Intervention Lens**.

## How the chart splits

A vertical line marks the **first day that strategy appears in this date range**. The tag reads **Strategy first logged:** plus the strategy name.

- Days to the **left** of the line are **before**.
- The first-logged day **and every day after it** are **after**.

Later uses of the same strategy do not move the line. Only that first day in the range matters.

The bars are the daily count for the measured category.

Two **dashed** horizontal lines mark the averages:

- **Gray**, to the left of the split — the before average (the baseline)
- **Green**, to the right of the split — the after average

If there are no before days, the gray line is not drawn. If nothing was logged on one side, that side’s average is 0 and its line sits on the bottom of the chart — you will only see the other line.

Three numbers sit above the chart.

The label **events / day** is a **rate**: how often that category was logged, on average, **per day**. It says "day" because that is the unit of the rate — like miles per hour after a three-hour drive. **0.3 events / day** means 0.3 events each day, averaged across those calendar days.

**Before** and **after** use the same math: total events in the measured category, divided by **every calendar day** in that stretch. Days with nothing logged still count as 0.

- **events / day, before** — that rate for every calendar day to the **left** of the split. A dash (**—**) here means there are no days to the left of the split (that dash is not a line on the chart).
- **after "…" (first logged …)** — that rate from the first-logged day through the end of the range.
- **change in daily frequency** — how much the after average moved relative to the baseline, as a percent

Smaller charts under the main chart use the **same split** and the **same percent** as the big chart for that category. Pick that category under **MEASURED AGAINST** and the number matches. When the big chart shows **n/a**, those smaller percents show a dash (**—**).

## Note: the first-logged day is only this range

The split is the first time that strategy was logged **in the dates you picked**, not the first time it was ever used for this profile.

If that first day is the start of your range, there are no before days — so there is no baseline. The first number shows a dash, the gray average line is not drawn, and the percent shows **n/a** with **no baseline before this date**. Start the range earlier so some days sit before that first use.

The note under the chart — **Widen the range for a longer baseline** — means include more days before that first log, so the before average is based on more days.

The percent is also **n/a** when there are before days but **nothing** in the measured category was logged on any of them. The average is then actually 0 — not a small number rounded to **0.0**. The first number shows **0.0**, the gray line sits on the bottom of the chart, and the third number shows **n/a** with **no baseline before this date**. A percent cannot be calculated from zero.

To change the dates, see [Date ranges](https://support.behca.com/hc/behca-support/articles/charts-and-date-ranges).

## Green and red

The percent is colored from **Success defined by** on the measured category:

- **Fewer events (decrease)** — a drop is green; a rise is red. This is the default for Challenging and Warning.
- **More events (increase)** — a rise is green; a drop is red. This is the default for Desirable.

## Reading the percent

The percent compares **daily averages**, not how many events happened in total. Empty days still count as 0, so a long before stretch with one event is a small baseline, and a short after stretch with one event is a much higher average. One bar on each side of the split can still show a very large percent — for example **0.0**, **0.3**, and **+867%**.

The numbers above the chart round to one decimal. One event over many before days can display as **0.0** and still produce a percent — that **0.0** is rounding, not an average of zero. An actual average of zero (no events on any before day) shows **0.0** on the first number and **n/a** on the third.

A short range on either side of the split makes the percent jumpy. Widen the dates so both sides have enough days, and read the bars — not only the percent.

## Who sets strategy vs measured against

**Intervention Strategies** is the default strategy category. Managers can mark **other behavior categories** as strategies too — including custom ones — and you can have more than one. When more than one strategy category has data, the **STRATEGY** list groups names by category.

Managers set this under **Organization Settings → Tracking Templates**. Open **Category settings** (the cog) on a behavior category. Under **Intervention Lens Graph Settings** you will see **Use as intervention / strategy category**.

- Check that box for categories where the team logs what they did in response. Those names fill the **STRATEGY** list. While the box is checked, **Success defined by** is hidden — that control is only for categories you measure against.
- Leave the box unchecked for categories you compare against. Then **Success defined by** appears: **Fewer events (decrease)**, **More events (increase)**, or **N/A — not used with Intervention Lens**. N/A takes that category off **MEASURED AGAINST**.

**Intervention Strategies** always feeds the **STRATEGY** list. Checking the box on other categories adds those as well. Environment and health categories cannot be strategies.

If every remaining outcome category is set to N/A, the page says **No outcome categories available to measure against.**

## Exporting

**Export PDF** on the Dashboard captures the view you have open, so set the strategy and the measured category first. See [Exporting PDF reports](https://support.behca.com/hc/behca-support/articles/exporting-pdf-reports).

## Common questions

- **It says no strategies logged.** — Nothing was logged in **any** strategy category in these dates. Widen the dates, or log the strategy on the daily **Behavior** tab.
- **A strategy I use is not in the list.** — It was not logged in these dates. Widen the dates.
- **The percent says n/a / no baseline before this date.** — Either there are no before days (first number is a dash), or there are before days with **zero** events in the measured category (first number is **0.0**, third number is **n/a**). That is different from a small average that rounds to **0.0** and still shows a percent. The smaller charts show **—** instead of **n/a**.
- **I don't see N/A in Tracking Templates.** — That option is under **Organization Settings → Tracking Templates**. Open the cog on a category you measure against, uncheck **Use as intervention / strategy category**, and **Success defined by** appears. **N/A — not used with Intervention Lens** is the third option. The third number on the chart can also show **n/a** when there is no percent.
- **A category is missing under MEASURED AGAINST.** — A manager set **Success defined by** to **N/A**, or the category is marked **Use as intervention / strategy category**.
- **Can I turn off Intervention Strategies as a strategy?** — That category still appears on the **STRATEGY** list. Mark other behavior categories as strategies alongside it.
- **The percent is huge (hundreds of percent) but the bars look similar.** — The percent compares daily averages, not totals. A long before stretch with one event vs a short after stretch with one event will jump. The before number can also round to **0.0** while the percent still uses a small real baseline. Widen the dates so both sides have more days.
- **Can I compare two strategies side by side?** — Not in one chart. Switch strategies in the dropdown.

## Related articles

- [Dashboard charts](https://support.behca.com/hc/behca-support/articles/dashboard-charts)
- [Dashboard overview](https://support.behca.com/hc/behca-support/articles/dashboard-overview)
- [Reading the audit log](https://support.behca.com/hc/behca-support/articles/reading-the-audit-log)
- [Logging a behavior](https://support.behca.com/hc/behca-support/articles/logging-a-behavior)
- [Date ranges](https://support.behca.com/hc/behca-support/articles/charts-and-date-ranges)
- [Organization Settings](https://support.behca.com/hc/behca-support/articles/behca-organization-settings)