Engineering Context¶
Purpose¶
This page explains how ETIS treats deployment and transition.
Deployment changes where the system exists and who can touch it. Transition changes who understands, supports, observes, and is affected by it.
Both must be controlled.
Deployment must preserve scope¶
Deployment must not expand beyond approved release and operational boundaries.
If ES-110 approved internal engineering review only, deployment must not quietly become a pilot.
If AI functionality was disabled, deployment must not enable it.
If only sample data was approved, deployment must not accept real operational data.
Deployment is not a loophole.
Environment readiness¶
The target environment must be ready before deployment.
Readiness may include correct baseline, correct configuration, disabled features confirmed, approved users configured, sample data rules enforced, monitoring hooks available, rollback path known, support contacts ready, and evidence locations ready.
Environment readiness should be checked before deployment, not after failure.
Deployment execution evidence¶
Deployment should leave a record.
The deployment record should show what baseline was deployed, who deployed it, when it was deployed, where it was deployed, what checks were run, what configuration was used, what features were enabled or disabled, what issues occurred, and whether rollback was available.
This is evidence, not ceremony.
Transition communication¶
Users and support roles must understand the transition.
Communication should clearly state who may use the system, what it is for, what it is not for, what data may be used, what features are disabled, how to report issues, when to stop, and who supports it.
If users misunderstand the transition, deployment risk increases immediately.
Access and data transition¶
Access and data are deployment-sensitive.
Before exposure, confirm only approved users have access, role assignments match scope, sample data only, prohibited data excluded, sensitive data rules clear, data reset or removal path known, and access review recorded.
Trust failures often start with access and data shortcuts.
Rollback validation¶
Rollback should not be theoretical.
For each scope, define what rollback means: disable access, revert branch, remove environment, reset sample data, disable feature, pause review, or notify users.
The plan should be validated enough to be credible.
Post-deployment checks¶
After deployment, confirm the system is reachable only by approved users, disabled features remain disabled, sample data rules hold, monitoring signals are visible, support owners can respond, stop criteria remain known, and the transition message was delivered.
Deployment is not complete until post-deployment checks are recorded.
Do not postpone access review until after users start using the system. Access is a deployment gate.
Deployment is successful only when the deployed system matches the approved operational story.