A feature flag needs a purpose, owner, default behaviour and retirement plan. Define the eligible audience, acceptance signals and recovery action before enabling it. Switching off a flag may hide a feature, but it does not automatically reverse data changes or external actions already performed.
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Separate release control from authorisation
Use a flag to control intended rollout behaviour, while enforcing permissions independently. A disabled button is not an access-control mechanism, and a guessed API request should not bypass the approved boundary.
Microsoft's feature-management guide describes feature flags for controlling functionality and targeted rollout. The product still needs its own rules for audience, observability and consequences.
Create a flag register
| Field | Decision to record | Failure to test |
|---|---|---|
| Purpose | Release, experiment or operational control | Long-lived ambiguity |
| Owner | Who can change and retire it? | Unowned production switch |
| Audience | Which users or tenants qualify? | Inconsistent experience across sessions |
| Default | Behaviour if configuration is unavailable | Unsafe or broken fallback |
| Signals | What permits expansion or requires stopping? | Success judged only from page views |
| Recovery | What disabling actually changes | Persistent side effects remain |
| Retirement | When is old code removed? | Forgotten branches accumulate |
Distinguish an experiment from a gradual release. An experiment needs a defined question and analysis design; enabling a percentage of users does not automatically establish a valid causal comparison.
Test transitions and dependent states
For a hypothetical new approval flow, a user may begin work while the flag is enabled and return after it is disabled. Decide how drafts, in-progress tasks and records created under the new path behave.
Check server and client evaluation consistency where both are involved. Avoid an interface presenting one workflow while the backend applies another. Record configuration changes in the appropriate audit history.
Monitor outcomes and remove completed flags
Review task completion, errors, support issues and important record integrity checks. Define the person who can stop expansion and the decision process for an incident.
After the feature is accepted, retire obsolete branches and tests that no longer represent supported behaviour. Verify the intended default before removing the flag. A register helps prevent temporary release controls from becoming undocumented product configuration.
Feature flag questions
Does turning a flag off roll back the release?
Only the behaviour governed by that flag changes. Data migrations and external effects need their own recovery plan.
Should every customer-specific setting be a flag?
Some settings are durable product configuration. Define ownership and lifecycle rather than treating every switch as a temporary rollout tool.
Pair the plan with release readiness criteria, and discuss controlled delivery with Drema's cloud and DevOps team.
This article explains what to build, not legal advice. Rules change; confirm against the current official text before relying on it.