# Event attendee communication channel matrix — editable worksheet

Copy one row per **approved information change** and affected audience. This is for routine event operations. Use the venue's approved emergency communication plan for safety instructions.

**Event / edition:** [ ]  **Current information page or record:** [ ]  **Decision owner:** [ ]  **Message coordinator:** [ ]

| Change ID and approved fact | Affected audience and exclusions | Source-of-truth URL/version | Fact approver | Primary channel and reachable group | Backup channel / on-site route | Copy owner and locale | Planned send/publish | Sent/published evidence | Failed or unreached group and next action |
|---|---|---|---|---|---|---|---|---|---|
| [ ] | [ ] | [ ] | [ ] | [ ] | [ ] | [ ] | [ ] | [ ] | [ ] |

## Channel reachability card

| Channel | Can this affected group actually use it? | Current content owner | How will we verify the update? | Fallback if absent or failed? |
|---|---|---|---|---|
| Event website | [public URL reachable?] | [ ] | [open exact URL and read fact] | [ ] |
| Email | [valid registered address and eligible audience?] | [ ] | [test, send log, bounce review] | [ ] |
| SMS / messaging | [number, permission and service available?] | [ ] | [provider status and reply route] | [ ] |
| Event app / push | [app use and notification reachability known?] | [ ] | [test device and platform result] | [ ] |
| On-site signage / screens | [which entrance, room or route?] | [ ] | [staff checks each affected location] | [ ] |
| Briefed staff | [who is on shift and who covers gaps?] | [ ] | [acknowledged briefing] | [ ] |

## Approval and closure

- **What changed, in one sentence:** [ ]
- **What attendees should do now:** [ ]
- **What remains unchanged:** [ ]
- **Where to ask for help:** [ ]
- **Before sending:** [ ] source page updated; [ ] audience and exclusions checked; [ ] language versions checked; [ ] message reviewed; [ ] links tested; [ ] backup route staffed.
- **After sending:** [ ] provider/log status reviewed; [ ] on-site copies checked; [ ] failed or unreached group assigned; [ ] support team informed; [ ] old contradictory copies removed.

An email queued or SMS marked sent does not prove every person read or understood it. Do not assume every attendee has an app, a phone number or permission for every channel. Follow your organization's communication and privacy rules before using attendee contact data. If the change concerns immediate safety, use the authorized venue emergency route rather than this worksheet.