Use four operating gates to limit scope until exclusions, custody, exception handling and measurable evidence are defined.
Gate 0 — Define what will not be accepted
An exclusion list should come before the collection-box design. Identify items that would change worker-safety controls or the treatment route, items that cannot be reliably identified and items that may retain personal information. A box without exclusions may look convenient to users while transferring unlimited uncertainty to the operator.
Gate 1 — Identify who physically handles the stream
The brand owner, platform provider, visiting service team, transporter and treatment operator do not have to be the same entity. Custody and responsibility at every hand-off must nevertheless be explicit. A statement that organisations will work together is not a substitute for a role-and-liability table.
Gate 2 — Design both the normal route and the incident route
Map normal collection, storage and transfer, then add wrong-item deposits, breakage, leakage, loss and failed visits. A diagram that shows only the normal route is a communication graphic. An operating diagram assigns an owner and a recovery action to every material exception.
Gate 3 — Confirm what can actually be measured
A programme should be able to record item count, weight, contamination, wrong-item rate, visit success and treatment evidence. Before measurement starts, publish the measurement plan rather than presenting expected benefits or carbon reductions as achieved results.
The one-page gate sheet
Give every gate four fields: evidence required, decision owner, pass condition and stop condition. Gate 0 passes only when accepted and excluded items can be communicated and physically separated. Gate 1 passes only when each hand-off has an authorised sender, receiver and document. Gate 2 passes only when the team has rehearsed the highest-consequence exception with substitutes. Gate 3 passes only when a sample record can be traced from intake to treatment evidence without adding facts after the event. A blank field is a failed gate, not an invitation to write a more confident narrative.
Run a red-tag drill before live intake
Place three deliberately wrong items, one unreadable identifier and one simulated damaged container into a clean dry run. Record who detects each condition, where the item is isolated, who may decide the next action and what evidence closes the incident. Stop the launch if an item can cross into the normal route without an owner, if the receiving party would reject the load, or if the record cannot show where custody changed. This drill tests the operating boundary; it does not prove that live waste collection is authorised.
Primary-source boundary
For Korean operations, consult the current Waste Control Act and subordinate rules through the National Law Information Center, https://www.law.go.kr, and obtain jurisdiction-specific confirmation before live collection. The Korea Environment Corporation EPR page is useful for the statutory EPR context: https://www.keco.or.kr/web/lay1/S1T183C1047/contents.do. Neither source substitutes for a written classification, role and route decision for the proposed stream.