# A/B Test Templates Reference

Templates for planning, documenting, and analyzing experiments.

## Test Plan Template

```markdown
# A/B Test: [Name]

## Overview
- **Owner**: [Name]
- **Test ID**: [ID in testing tool]
- **Page/Feature**: [What's being tested]
- **Planned dates**: [Start] - [End]

## Hypothesis

Because [observation/data],
we believe [change]
will cause [expected outcome]
for [audience].
We'll know this is true when [metrics].

## Test Design

| Element | Details |
|---------|---------|
| Test type | A/B / A/B/n / MVT |
| Duration | X weeks |
| Sample size | X per variant |
| Traffic allocation | 50/50 |
| Tool | [Tool name] |
| Implementation | Client-side / Server-side |

## Variants

### Control (A)
[Screenshot]
- Current experience
- [Key details about current state]

### Variant (B)
[Screenshot or mockup]
- [Specific change #1]
- [Specific change #2]
- Rationale: [Why we think this will win]

## Metrics

### Primary
- **Metric**: [metric name]
- **Definition**: [how it's calculated]
- **Current baseline**: [X%]
- **Minimum detectable effect**: [X%]

### Secondary
- [Metric 1]: [what it tells us]
- [Metric 2]: [what it tells us]
- [Metric 3]: [what it tells us]

### Guardrails
- [Metric that shouldn't get worse]
- [Another safety metric]

## Segment Analysis Plan
- Mobile vs. desktop
- New vs. returning visitors
- Traffic source
- [Other relevant segments]

## Success Criteria
- Winner: [Primary metric improves by X% with 95% confidence]
- Loser: [Primary metric decreases significantly]
- Inconclusive: [What we'll do if no significant result]

## Pre-Launch Checklist
- [ ] Hypothesis documented and reviewed
- [ ] Primary metric defined and trackable
- [ ] Sample size calculated
- [ ] Test duration estimated
- [ ] Variants implemented correctly
- [ ] Tracking verified in all variants
- [ ] QA completed on all variants
- [ ] Stakeholders informed
- [ ] Calendar hold for analysis date
```

---

## Results Documentation Template

```markdown
# A/B Test Results: [Name]

## Summary
| Element | Value |
|---------|-------|
| Test ID | [ID] |
| Dates | [Start] - [End] |
| Duration | X days |
| Result | Winner / Loser / Inconclusive |
| Decision | [What we're doing] |

## Hypothesis (Reminder)
[Copy from test plan]

## Results

### Sample Size
| Variant | Target | Actual | % of target |
|---------|--------|--------|-------------|
| Control | X | Y | Z% |
| Variant | X | Y | Z% |

### Primary Metric: [Metric Name]
| Variant | Value | 95% CI | vs. Control |
|---------|-------|--------|-------------|
| Control | X% | [X%, Y%] | — |
| Variant | X% | [X%, Y%] | +X% |

**Statistical significance**: p = X.XX (95% = sig / not sig)
**Practical significance**: [Is this lift meaningful for the business?]

### Secondary Metrics

| Metric | Control | Variant | Change | Significant? |
|--------|---------|---------|--------|--------------|
| [Metric 1] | X | Y | +Z% | Yes/No |
| [Metric 2] | X | Y | +Z% | Yes/No |

### Guardrail Metrics

| Metric | Control | Variant | Change | Concern? |
|--------|---------|---------|--------|----------|
| [Metric 1] | X | Y | +Z% | Yes/No |

### Segment Analysis

**Mobile vs. Desktop**
| Segment | Control | Variant | Lift |
|---------|---------|---------|------|
| Mobile | X% | Y% | +Z% |
| Desktop | X% | Y% | +Z% |

**New vs. Returning**
| Segment | Control | Variant | Lift |
|---------|---------|---------|------|
| New | X% | Y% | +Z% |
| Returning | X% | Y% | +Z% |

## Interpretation

### What happened?
[Explanation of results in plain language]

### Why do we think this happened?
[Analysis and reasoning]

### Caveats
[Any limitations, external factors, or concerns]

## Decision

**Winner**: [Control / Variant]

**Action**: [Implement variant / Keep control / Re-test]

**Timeline**: [When changes will be implemented]

## Learnings

### What we learned
- [Key insight 1]
- [Key insight 2]

### What to test next
- [Follow-up test idea 1]
- [Follow-up test idea 2]

### Impact
- **Projected lift**: [X% improvement in Y metric]
- **Business impact**: [Revenue, conversions, etc.]
```

---

## Test Repository Entry Template

For tracking all tests in a central location:

```markdown
| Test ID | Name | Page | Dates | Primary Metric | Result | Lift | Link |
|---------|------|------|-------|----------------|--------|------|------|
| 001 | Hero headline test | Homepage | 1/1-1/15 | CTR | Winner | +12% | [Link] |
| 002 | Pricing table layout | Pricing | 1/10-1/31 | Plan selection | Loser | -5% | [Link] |
| 003 | Signup form fields | Signup | 2/1-2/14 | Completion | Inconclusive | +2% | [Link] |
```

---

## Quick Test Brief Template

For simple tests that don't need full documentation:

```markdown
## [Test Name]

**What**: [One sentence description]
**Why**: [One sentence hypothesis]
**Metric**: [Primary metric]
**Duration**: [X weeks]
**Result**: [TBD / Winner / Loser / Inconclusive]
**Learnings**: [Key takeaway]
```

---

## Stakeholder Update Template

```markdown
## A/B Test Update: [Name]

**Status**: Running / Complete
**Days remaining**: X (or complete)
**Current sample**: X% of target

### Preliminary observations
[What we're seeing - without making decisions yet]

### Next steps
[What happens next]

### Timeline
- [Date]: Analysis complete
- [Date]: Decision and recommendation
- [Date]: Implementation (if winner)
```

---

## Experiment Prioritization Scorecard

For deciding which tests to run:

| Factor | Weight | Test A | Test B | Test C |
|--------|--------|--------|--------|--------|
| Potential impact | 30% | | | |
| Confidence in hypothesis | 25% | | | |
| Ease of implementation | 20% | | | |
| Risk if wrong | 15% | | | |
| Strategic alignment | 10% | | | |
| **Total** | | | | |

Scoring: 1-5 (5 = best)

---

## Hypothesis Bank Template

For collecting test ideas:

```markdown
| ID | Page/Area | Observation | Hypothesis | Potential Impact | Status |
|----|-----------|-------------|------------|------------------|--------|
| H1 | Homepage | Low scroll depth | Shorter hero will increase scroll | High | Testing |
| H2 | Pricing | Users compare plans | Comparison table will help | Medium | Backlog |
| H3 | Signup | Drop-off at email | Social login will increase completion | Medium | Backlog |
```