Conflicting experiments are not run simultaneously for one visitor.
Smart Mutex
Separate conflicting experiments and defend cleaner results.
Smart Mutex prevents the same visitor from entering experiments that can influence each other. It manages domain, audience and priority in intelligent exclusion groups to reduce overlap and preserve clearer attribution.
Experiment isolation
Showing one user two conflicting tests makes both results harder to trust.
Smart Mutex organizes experiments into intelligent mutual-exclusion groups. It evaluates eligibility, audience, domain, priority and group capacity to assign each visitor to one compatible experiment and reduce overlap contamination.
Audience and group conditions are evaluated before assignment.
Critical experiments can carry higher priority within the group.
Capacity, prevented conflicts and group health stay visible to operators.
Product capabilities
The core job Testvoy solves with this module.
This section shows what the module helps teams do, which risks it reduces and which decision it makes easier to defend.
Back to product hub01
Group tests that can conflict
Connect checkout, pricing or same-page experiments to one mutex group to isolate the visitor experience and measurement context.
- Domain and audience scope
- Experiment priority and capacity
- Blocking incompatible tests
02
Assign visitors to one eligible experiment
Smart Mutex uses eligibility, group capacity and audience context for safe assignment and does not force a match when no test is eligible.
- Deterministic visitor assignment
- Audience compatibility
- Visible no-eligible state
03
Monitor group health and prevented conflicts
Track possible overlaps prevented, groups approaching capacity and the resulting overlap rate in one operations view.
- Zero-overlap summary
- Prevented conflict count
- Group-level health signals
Where teams use it
Built for the experiment and optimization workflows teams run every week.
Multiple checkout experiments
Keep cart summaries, promotion messages and payment CTAs from contaminating one another.
Campaigns targeting the same audience
Organize tests aimed at new visitors or high-intent segments inside one mutex group.
Complex agency test calendars
Isolate simultaneous experiments on a client domain by conflict risk.
Decision path
The role this module plays in the experiment program.
Group tests that can conflict
Connect checkout, pricing or same-page experiments to one mutex group to isolate the visitor experience and measurement context.
Domain and audience scope
Experiment priority and capacity
Assign visitors to one eligible experiment
Smart Mutex uses eligibility, group capacity and audience context for safe assignment and does not force a match when no test is eligible.
Isolation
One visitor, one compatible experiment
How it works
Clearer setup, cleaner signals, faster decisions.
Testvoy positions this module to help teams move from experiment idea to report with the same data, context and decision language.
A mutex group is the invisible guardrail of the test calendar
When a pricing test and an offer-message test reach the same person, it becomes unclear which change produced the lift. A mutex group defines one conflict area and serves only one compatible test.
- Conflicting tests are grouped by domain or audience
- Group priority protects critical tests
- Assignment remains visible in report context
No eligible experiment should mean no forced assignment
Intelligent isolation is more than blocking conflict. If a visitor matches no audience or group capacity is full, the system should expose the no-eligible state.
- Audience rules are evaluated before assignment
- Capacity does not create new overlap
- No-eligible states remain visible to operators
Group health improves experiment-capacity planning
Seeing how many conflicts were prevented, which group is near capacity and which domain is overloaded helps teams build a healthier test calendar.
- Conflict-prevented metrics show isolation value
- Group capacity guides scheduling
- A zero-overlap goal is easier to defend
FAQ
Fast answers before the decision.
What is a mutex group?
It is a mutual-exclusion group that prevents conflicting experiments from running simultaneously for one visitor.
Does Smart Mutex affect deployment counts?
No. Smart Mutex manages visitor assignment across active experiments; it is not a deployment counter or code-release workflow.
Which experiment does a visitor enter?
Audience eligibility, domain scope, priority and capacity are evaluated before choosing one compatible experiment.
Which plan includes Smart Mutex?
Smart Mutex belongs to the advanced experiment-operations layer in Professional and Agency plans.
An intelligent mutual-exclusion layer that prevents experiment conflict, assigns each visitor to one eligible test and keeps group health visible.
Assignment by domain, audience and priority