---
tool_id: WACK-TOOL-0005
concept_id: WACK-CONCEPT-0007
playbook_content_id: WACK-CONTENT-0024
status: draft
technical_review: pending
artifact_type: working_worksheet
---

# Inherited Wack Retirement Experiment

> Replace “something might break” with a bounded learning and rollback plan.

**Expected output:** A current dependency hypothesis, controlled experiment, and keep/narrow/replace/remove decision.  
**Working time:** 60 minutes  
**Derived from:** WACK-CONTENT-0024

## Working context

Organization / environment: __________________________________________  
Facilitator / owner: __________________________________________________  
Participants: _________________________________________________________  
Date: ____________________  Review trigger or next date: ______________

## 01 / Find — Choose the inherited mystery

Prioritize one unexplained configuration by reach, privilege, uncertainty, and recurring cost.

- [ ] **What behavior exists, where is it implemented, and what historical rationale survives?**

  Notes: ________________________________________________

- [ ] **Who owns the current risk decision even if nobody owns the original change?**

  Notes: ________________________________________________

## 02 / Map — Observe real dependencies

Use telemetry, history, interviews, and controlled observation.

- [ ] **Which traffic, identity, process, job, control, or service may depend on the behavior?**

  Notes: ________________________________________________

- [ ] **What evidence distinguishes an active dependency from stale or incidental activity?**

  Notes: ________________________________________________

## 03 / Explain — State the hypothesis

Define expected behavior, risk, success, and rollback before testing.

- [ ] **What do we expect to happen if the behavior is narrowed or removed?**

  Notes: ________________________________________________

- [ ] **What signal requires immediate rollback, and who can make that decision?**

  Notes: ________________________________________________

## 04 / Reduce — Run the smallest safe test

Constrain exposure and test in a bounded sequence.

- [ ] **Which consumers can migrate or which boundary can narrow before the experiment?**

  Notes: ________________________________________________

- [ ] **What is the smallest reversible change that increases confidence?**

  Notes: ________________________________________________

## 05 / Prove — Record the new decision

Replace inherited rationale with current evidence.

- [ ] **Do results support keeping, narrowing, replacing, or removing the behavior?**

  Notes: ________________________________________________

- [ ] **What monitoring, remaining boundary, owner, and next review date survive the decision?**

  Notes: ________________________________________________

## Completion check

- [ ] A current decision owner is named.
- [ ] The experiment has success and rollback criteria.
- [ ] The final decision records observed dependencies and evidence.

## Decision and next action

Decision: _____________________________________________________________  
Owner: __________________________  Due date: ___________________________  
Evidence or artifact location: ________________________________________

---

_Working practitioner worksheet pending technical review. It does not determine PCI DSS compliance, replace the standard, or replace instructions from an assessor or compliance-accepting entity. The Cluster of Wack is an independent resource and is not affiliated with or endorsed by PCI SSC._